I Need yo solve This four equations with the system of Elimination

1. Y=-x-1 and Y=2x+5

2. X=2y-3 and 2x+3y=15

3. -2x+y=10 and 2x+y=18

4. X+y=8 and X+3y=14

The given equation for the fractional part of a battery, B, that is still good after I hours of use is B = 3-004. We need to find the fractional part of the battery that is still operating after 100 hours of use.

To do that, we substitute the value of I with 100 in the equation B = 3-004:

B = 3-004 = 3-004 = 2-996.

Therefore, after 100 hours of use, the fractional part of the battery that is still operating is 2-996.

The equation B = 3-004 represents the relationship between the fractional part of the battery that is still good and the hours of use. The term 3-004 represents the fraction of the battery that is still operating after a certain number of hours. By substituting I with 100 in the equation, we can determine the specific fractional part of the battery that remains operational after 100 hours of use, which is calculated to be 2-996. This means that approximately 2.996 or 99.6% of the battery is still functioning after 100 hours.

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a. (3, 0) in rectangular coordinates is equivalent to (3, 0°) in polar coordinates. b. (12, 123√) in rectangular coordinates is equivalent to (sqrt(15273), arctan((123√) / 12)) in polar coordinates. c.  (-7, 7) in rectangular coordinates is equivalent to (sqrt(98), -π/4) in polar coordinates. d.  the arctan function = arctan((3-√) / -1).

To convert from rectangular to polar coordinates, we need to determine the values of the radial distance r and the angle θ. The radial distance r represents the distance from the origin to the point, and the angle θ represents the angle formed by the line connecting the point to the origin with the positive x-axis.

Let's convert each given point from rectangular to polar coordinates:

(a) (3, 0) ⇒ (r, θ) ( , )

For this point, the x-coordinate is 3 and the y-coordinate is 0. We can calculate the radial distance using the formula:

r = sqrt(x^2 + y^2)

= sqrt(3^2 + 0^2)

= sqrt(9)

= 3

Since the y-coordinate is 0, the angle θ can be any value along the x-axis. We can choose θ to be 0 degrees.

Therefore, (3, 0) in rectangular coordinates is equivalent to (3, 0°) in polar coordinates.

(b) (12, 123√) ⇒ (r, θ) ( , )

For this point, the x-coordinate is 12 and the y-coordinate is 123√. Again, we can calculate the radial distance:

r = sqrt(x^2 + y^2)

= sqrt(12^2 + (123√)^2)

= sqrt(144 + 15129)

= sqrt(15273)

To find the angle θ, we can use the arctan function:

θ = arctan(y / x)

= arctan((123√) / 12)

Therefore, (12, 123√) in rectangular coordinates is equivalent to (sqrt(15273), arctan((123√) / 12)) in polar coordinates.

(c) (-7, 7) ⇒ (r, θ) ( , )

For this point, the x-coordinate is -7 and the y-coordinate is 7. The radial distance can be calculated as:

r = sqrt(x^2 + y^2)

= sqrt((-7)^2 + 7^2)

= sqrt(49 + 49)

= sqrt(98)

To find the angle θ, we need to consider the signs of both coordinates. Since the x-coordinate is negative and the y-coordinate is positive, the point is in the second quadrant. We can use the arctan function:

θ = arctan(y / x)

= arctan(7 / -7)

= arctan(-1)

= -π/4

Therefore, (-7, 7) in rectangular coordinates is equivalent to (sqrt(98), -π/4) in polar coordinates.

(d) (-1, 3-√) ⇒ (r, θ) ( , )

For this point, the x-coordinate is -1 and the y-coordinate is 3-√. The radial distance can be calculated as:

r = sqrt(x^2 + y^2)

= sqrt((-1)^2 + (3-√)^2)

= sqrt(1 + (3-√)^2)

= sqrt(1 + 9 - 6√ + (√)^2)

= sqrt(10 - 6√)

To find the angle θ, we need to consider the signs of both coordinates. Since the x-coordinate is negative and the y-coordinate is positive, the point is in the second quadrant. We can use the arctan function:

θ = arctan(y / x)

= arctan((3-√) / -1)

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The larger integer is 19 and the smaller integer is 12.

Given that, the larger integer is x, and the smaller integer is y.

The sum of two positive integers is 31.

x+y=31 ------(i)

The difference between the two integers is 7.

x-y=7 ------(ii)

Add equation (i) and (ii), we get

x+y+x-y=31+7

2x=38

x=38/2

x=19

Substitute x=19 in equation (i), we get

19+y=31

y=31-19

y=12

Therefore, the larger integer is 19 and the smaller integer is 12.

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In the given proof shown below, the idea of tangents and perpendicularity is used to set up a relationship between two lines, AR and BS.

The tangent is a term that is used to tell more or described as the  point of contact between a circle or an ellipse and a single line.

Based on the fact  that the tangent line is perpendicular to radius of the circle.

Hence, AR ⊥ RS and BS ⊥ RS

Therefore, AR and BS ⊥ similar to line RS.

So,  the line AR or BS are said to be either in same line or parallel. because , they are the radius of different circles.

Therefore, AR ║BS.

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The equation 2sin²(x) - 3sin(x) + 3 = -1 has no exact solutions on the interval 0 < x < π/2.

We have,

To solve the equation 2sin²(x) - 3sin(x) + 3 = -1 on the interval 0 < x < π/2, we can use the substitution u = sin(x).

This allows us to convert the equation into a quadratic equation in terms

of u.

Let's proceed step by step:

- Substitute u = sin(x) in the equation:

2u² - 3u + 3 = -1

- Rearrange the equation and set it equal to zero:

2u² - 3u + 4 = 0

- Solve the quadratic equation using the quadratic formula:

u = (-b ± √(b² - 4ac)) / (2a)

- Plugging in the values a = 2, b = -3, and c = 4:

u = (3 ± √(9 - 32)) / 4

u = (3 ± √(-23)) / 4

Since we're working with real solutions, the discriminant (-23) is negative, which means there are no real solutions for u.

Therefore, there are no solutions for x in the given interval that satisfy the equation.

Thus,

The equation 2sin²(x) - 3sin(x) + 3 = -1 has no exact solutions on the interval 0 < x < π/2.

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The value using Green's theorem will be zero.

Given that:

[tex]\begin{aligned} \rm I &= \int_C (x^2 - y^2) dx + 2xydy \end{aligned}[/tex]

C: x² + y² = 16

A line integral over a closed curve is equivalent to a double integral over the area that the curve encloses according to Green's theorem, a basic conclusion in vector calculus. It ties the ideas of surface and line integrals together.

Formally, let D be the area encompassed by C, which is a positively oriented, piecewise smooth, closed curve in the xy plane. Green's theorem asserts that if P(x, y) and Q(x, y) are continuously differentiable functions defined on an open area containing D:

∮C (Pdx + Qdy) = ∬D (Qx - Py) dA

The radius of the circle is calculated as,

x² + y² = 16

x² + y² = 4²

The radius is 4. Then we have

[tex]\begin{aligned} \vec{F}(x,y)&=(x^2-y^2) \hat{i} + (2xy)\hat{j}\\\\\vec{F}(x,y)&=\vec{F_1}(x,y) \hat{i} + \vec{F_2}(x,y) \hat{j}\\\\\dfrac{\partial F_2 }{\partial x} &= \dfrac{\partial F_1}{\partial y}\\\\\dfrac{\partial F_2 }{\partial x} &= \dfrac{\partial }{\partial x} (2xy) \ \ \ or \ \ \ 2y\\\\\dfrac{\partial F_1}{\partial y}&=\dfrac{\partial }{\partial y} (x^2-y^2) \ \ \ or \ \ \ -2y \end{aligned}[/tex]

The value is calculated as,

[tex]\begin{aligned} \int_C F_1dx + F_2 dy &= \int_R\int \left( \dfrac{\partial F_2}{\partial x} - \dfrac{\partial F_1}{\partial y} \right ) dxdy\\ \end{aligned}[/tex]

Substitute the values, then we have

[tex]\begin{aligned}I &= \int_R \int (2y - (-2y))dxdy\\I &= 4 \int_{x=-4}^4 \int_{y= -\sqrt{16-x^2}}^{y = \sqrt{16-x^2}} y dy\\I &= 4 \int_{x=-4}^4 \left [ \dfrac{y^2}{2} \right ]_{ -\sqrt{16-x^2}}^{y\sqrt{16-x^2}} \\I &=2 \int_{x=-4}^4 [(16-x^2)-(16-x^2)]dx\\I &= 2 \int_{x=-4}^4 0 dy\\I &= 0 \end{aligned}[/tex]

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The limit of the function is solved by L'Hopital's rule and the value of the relation [tex]\lim_{x \to 0} \frac{(x - tan^{-1}x )}{(x^{4} )} = -2/5[/tex]

Given data ,

To evaluate the limit of the expression  [tex]\lim_{x \to 0} \frac{(x - tan^{-1}x )}{(x^{4} )}[/tex], we can use series expansion.

Let's start by expanding the function tan⁻¹x in a Taylor series around x = 0. The Taylor series expansion for tan⁻¹x is:

[tex]tan^{-1}x = x - \frac{x^{3}}{3} + \frac{x^{5}}{5} - \frac{x^{7}}{7} + ...[/tex]

Now, let's substitute this expansion into the given expression:

[tex]\lim_{x \to 0} \frac{(x - tan^{-1}x )}{(x^{4} )}[/tex]

[tex]=\lim_{x \to 0} \frac{[ x - \frac{x^{3}}{3} + \frac{x^{5}}{5} - \frac{x^{7}}{7} + .. ]}{x^{4}} \\[/tex]

[tex]=\lim_{x \to 0} \frac{[ \frac{1}{3}+\frac{x^{2}}{5}+\frac{x^{4}}{7}..... ]}{x^{1}} \\[/tex]

Now, we can apply the limit as x approaches 0:

[tex]=\frac{[\frac{1}{3} -\frac{0}{5} +\frac{0}{7} ....]}{0}[/tex]

= 0/0 (indeterminate form)

To evaluate this indeterminate form, we can use L'Hopital's rule. Taking the derivative of the numerator and denominator, we get:

So, [tex]\lim_{x \to 0} \frac{(x - tan^{-1}x )}{(x^{4} )} = -2/5[/tex]

Hence , the limit of the expression [tex]\lim_{x \to 0} \frac{(x - tan^{-1}x )}{(x^{4} )} = -2/5[/tex]

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Sorry for bad handwriting

if i was helpful Brainliests my answer ^_^

The volume of the solid that lies within the sphere x2 y2 z2=1, above the xy plane, and outside the cone z=√(8x2/y2 is 4π/5.

To solve the problem, we first need to find the limits of integration. The cone intersects the sphere at z=√(8x2/y2) and x2 + y2 + z2 = 1, so we can solve for y in terms of x and z:

x2 + y2 + z2 = 1

y2 = 1 - x2 - z2

y = ±√(1 - x2 - z2)

We only need the upper half of the sphere, so we take the positive square root:

y = √(1 - x2 - z2)

Since the cone is defined by z=√(8x2/y2), we can substitute this into the equation for y to get:

√(1 - x2 - z2) = √(8x2/(z2 - x2))

Squaring both sides gives:

1 - x2 - z2 = 8x2/(z2 - x2)

(z2 - x2) - x2 - z2 = 8x2

2x2 + 2z2 = z2 - x2

3x2 = z2

So the cone intersects the sphere along the curve 3x2 = z2. Since we are only interested in the portion of the sphere above the xy plane, we can integrate over the region x2 + y2 ≤ 1, 0 ≤ z ≤ √(3x2):

∫∫∫V dV = ∫∫R ∫0^√(3x^2) dz dA

where R is the region in the xy-plane given by x2 + y2 ≤ 1. We can switch to cylindrical coordinates by letting x = r cos θ, y = r sin θ, and dA = r dr dθ, so the integral becomes:

∫0^2π ∫0^1 ∫0^√(3r^2) r dz dr dθ

Evaluating the inner integral gives:

∫0^√(3r^2) r dz = 1/2 (3r^2)^(3/2) = 3r^3/2

Substituting back and evaluating the remaining integrals gives:

∫0^2π ∫0^1 3r^3/2 dr dθ = 2π ∫0^1 3r^3/2 dr = 2π [2/5 r^(5/2)]_0^1 = 4π/5

So, the volume of the solid is 4π/5.

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Answer:

x = 165°

Step-by-step explanation:

Linear pair: If the uncommon arm of adjacent angles form a straight line, then they are called linear pair and these adjacent angles add up to 180°

        15 + x = 180

Subtract 15 from both sides,

                x = 180 - 15

               x = 165°

Using sine rule, the bearing of A's route from C is 109.1°

To calculate the bearing of A's route from port C, we can use trigonometry and the given information. Let's denote the bearing of A's route from C as θ.

Since we have the value of three sides and only one angle, we can use sine rule to find the missing side.

a / sin A = b / sin B

10/ sin 40 = 8 / sin B

sin B = 8sin 40/ 10

sin B = 0.51423

B = sin⁻¹ (0.51423)

B = 30.94

Using the sum of angles in a triangle;

30.94 + 40 + x = 180

x = 109.1°

The bearing of A to C is 109.1°

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The fraction that is doubled after subtracting the fourth part of the original fraction is equal to 3n/2

Let the numerator be represented by the variable 'n'.

Now, break down the problem step by step.

The fourth part of the numerator is n/4.

Subtracting the fourth part from the numerator gives us n - (n/4).

Simplifying, we have (4n - n)/4 = 3n/4.

So, the numerator after subtracting the fourth part is 3n/4.

To find the fraction that is doubled,

we need to compare the original fraction (n/4) with the result of doubling the fraction after subtracting the fourth part (2×(3n/4)).

The original fraction is n/4, and doubling after applying the other conditions gives us 3n/2.

Therefore, the fraction that is doubled as per given details is 3n/2.

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In summary, the limits of the function f(x) are as follows: lim(x→2-) f(x) = 2, lim(x→2+) f(x) = 1, lim(x→∞) f(x) = ∞, lim(x→-∞) f(x) = -∞

To determine the limits of the function f(x) as x approaches certain values, we can plot the graph of the function and observe the behavior. Let's analyze the limits of f(x) as x approaches different values.

First, let's plot the graph of the function f(x):

For x ≤ 2, the graph of f(x) is a downward-opening parabola that passes through the points (2, 0) and (0, 10). The vertex of the parabola is located at x = 1, and the curve decreases as x moves further away from 1.

For x > 2, the graph of f(x) is a linear function with a positive slope of 2. The line intersects the y-axis at (0, -3) and increases as x moves further to the right.

Now, let's analyze the limits:

Limit as x approaches 2 from the left: lim(x→2-) f(x)

Approaching 2 from the left side, the function approaches the value of 10 - 2 - 2^2 = 2. So, lim(x→2-) f(x) = 2.

Limit as x approaches 2 from the right: lim(x→2+) f(x)

Approaching 2 from the right side, the function follows the linear segment 2x - 3. So, lim(x→2+) f(x) = 2(2) - 3 = 1.

Limit as x approaches positive infinity: lim(x→∞) f(x)

As x approaches positive infinity, the linear segment 2x - 3 dominates the function. Therefore, lim(x→∞) f(x) = ∞.

Limit as x approaches negative infinity: lim(x→-∞) f(x)

As x approaches negative infinity, the parabolic segment 10 - x - x^2 dominates the function. Therefore, lim(x→-∞) f(x) = -∞.

These limits are determined by observing the behavior of the function as x approaches different values and analyzing the graph of the function.

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In statistics, SSB stands for the "sum of squares between groups." The sum of squares between groups (SSB) is a measurement of the difference between the sample means and the population mean.

The variability between the treatment conditions must be established in order to do the SSB (Sum of Squares Between) calculation. The SSB calculates the variations in group means.

First, we determine the data's overall mean:

Mean = (10 + 12 + 13 + 8 + 17 + 20 + 10 + 9 + 6 + 10 + 26) / 15 = 12

The mean is then determined for each treatment condition:

The average number of warnings is (10 + 8 + 10 + 6) / 4 = 8.5 

The average number of warnings is (12 + 17 + 9 + 10) / 4 = 12.

(13, 20, and 26) / 3 (two warnings on average) = 19.67

The following formula can be used to determine SSB:

SSB is equal to n1 times the overall mean (Mean1), n2 times the overall mean (Mean2), and n3 times the overall mean (Mean3).

where the sample sizes for each treatment condition are n1, n2, and n3.

Given the information, n1 = 4, n2 = 4, and n3 = 3.

SSB = 4 * (8.5 - 12)^2 + 4 * (12 - 12)^2 + 3 * (19.67 - 12)^2

= 4 * (-3.5)^2 + 4 * (0)^2 + 3 * (7.67)^2

= 49 + 0 + 176.88

= 225.88

SSB is therefore 225.88 (rounded to the nearest hundredth).

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The formula for the function P(x) representing the population of the town x years after 2003 is P(x) = 50,800 + 3,500x. Using this formula, the population of the town in 2015 will be 59,800 people.

To find the formula for the function P(x) representing the population of the town x years after 2003, we start with the initial population in 2003, which is 50,800 people. Since the population has been growing linearly by approximately 3,500 people each year, we can express this growth rate as 3,500x, where x represents the number of years after 2003.

Thus, the formula for the function P(x) is given by:

P(x) = 50,800 + 3,500x.

To determine the population of the town in the year 2015, we substitute x = 12 into the formula:

P(12) = 50,800 + 3,500(12) = 50,800 + 42,000 = 92,800.

Therefore, in 2015, the population of the town will be 92,800 people.

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The expected cost per pooled sample is: (1 - p)^k * C + (1 - (1 - p)^k) * (C + C * k) , the testing cost per car is $28.30 for n = 1000, p = 0.02, k = 10, and C = $100.00 and the testing cost per car is $29.70.

a. Expected cost to test a pooled sample of k autos:

If the test on the pooled sample is negative, we only incur the cost of testing one sample, which is C.

If the test on the pooled sample is positive, we need to test each car separately, which incurs an additional cost of C for each car.

The probability that a pooled sample tests negative is (1 - p)^k, and the probability that it tests positive is 1 - (1 - p)^k.

Therefore, the expected cost per pooled sample is: (1 - p)^k * C + (1 - (1 - p)^k) * (C + C * k).

b. For n = 1000, p = 0.02, k = 10, and C = $100.00:

In this case, the number of pooled samples, m, is given by n/k = 1000/10 = 100.

The total expected cost can be calculated by multiplying the expected cost per pooled sample by the number of pooled samples:

Total expected cost = m * expected cost per pooled sample

Cost per car = Total expected cost / n

Substitute the given values into the formula:

m = 100

p = 0.02

k = 10

C = $100.00

Calculate the expected cost per pooled sample:

Expected cost per pooled sample = (1 - 0.02)^10 * $100.00 + (1 - (1 - 0.02)^10) * ($100.00 + $100.00 * 10)

= 0.817 * $100.00 + 0.183 * $1100.00

= $81.70 + $201.30

= $283.00

Calculate the total expected cost:

Total expected cost = 100 * $283.00

= $28,300.00

Calculate the cost per car:

Cost per car = $28,300.00 / 1000

= $28.30

Therefore, the testing cost per car is $28.30 for n = 1000, p = 0.02, k = 10, and C = $100.00.

c. For n = 1000, p = 0.02, k = 5, and C = $100.00:

Similar to part b, calculate the expected cost per pooled sample, total expected cost, and cost per car using the given values:

m = 1000/5 = 200

p = 0.02

k = 5

C = $100.00

Calculate the expected cost per pooled sample:

Expected cost per pooled sample = (1 - 0.02)^5 * $100.00 + (1 - (1 - 0.02)^5) * ($100.00 + $100.00 * 5)

= 0.903 * $100.00 + 0.097 * $600.00

= $90.30 + $58.20

= $148.50

Calculate the total expected cost:

Total expected cost = 200 * $148.50

= $29,700.00

Calculate the cost per car:

Cost per car = $29,700.00 / 1000

= $29.70

Therefore, the testing cost per car is $29.70.

Therefore, the expected cost per pooled sample is: (1 - p)^k * C + (1 - (1 - p)^k) * (C + C * k) , the testing cost per car is $28.30 for n = 1000, p = 0.02, k = 10, and C = $100.00 and the testing cost per car is $29.70.

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AC=5cm

CB=4cm

hypotenuse=5²+4²=25+16=41

hypotenuse=√41=6.40cm

Answer: 648cm^3

Step-by-step explanation:

Volume=area of base * height

Area of base: 0.5*9*24=108

108*6=648cm^3

The required derivative of the function y = x^(ln x) is 2x^(ln x - 1) [(1 - ln x)/x].

Given function is y = x ln x

To find the derivative of the given function using logarithmic differentiation.The logarithmic differentiation formula is given by:logarithmic differentiation formula:If y = f(x) and u = g(x),

where both are differentiable functions, then the logarithmic differentiation of y with respect to u is given by,

(ln y)' = [f(x)]'/f(x) or dy/dx = y'.u'/uNow, let us use this formula to find the derivative of the given function.y = x ln xu = ln x(dy/dx) = y'.u'/u(dy/dx) = y'.[(d/dx) ln x]/ln x(dy/dx) = y'.(1/x)

Taking ln on both sides,ln y = ln x . ln(x)ln y = ln (x^ln x)ln y = ln x.ln x

Power rule of logarithm states that logn x^m = m logn xln y = ln x ln x(ln y/ln x) = ln x(ln y/ln x)' = 1(ln x)' + ln x(1/ln x)'ln x = 1/x[1/ln x] + ln x(-1/ln²x)(ln y/ln x)' = 1/x - 1/ln x

So, the derivative of y = x ln x is as follows:

dy/dx = x^(ln x) * [(1/x) - (1/ln x)]dy/dx = x^(ln x - 1) * [(1 - ln x)/x]Thus, 2y' = x^(ln x - 1) * [(1 - ln x)/x] * 2.2y' = 2x^(ln x - 1) * [(1 - ln x)/x].

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The required derivative of the function [tex]y = x^(ln x) is 2x^(ln x - 1) [(1 - ln x)/x].[/tex]

Given function is y = x ln x

To find the derivative of the given function using logarithmic differentiation.The logarithmic differentiation formula is given by:logarithmic differentiation formula:If y = f(x) and u = g(x),

where both are differentiable functions, then the logarithmic differentiation of y with respect to u is given by,

(ln y)' = [f(x)]'/f(x) or dy/dx = y'.u'/uNow, let us use this formula to find the derivative of the given function.y = [tex]x ln xu = ln x(dy/dx) = y'.u'/u(dy/dx) = y'.[(d/dx) ln x]/ln x(dy/dx) = y'.(1/x)\\[/tex]
Taking ln on both sides,ln y = ln x . ln(x)ln y = ln (x^ln x)ln y = ln x.ln x

Power rule of logarithm states that logn x^m = m logn xln [tex]y = ln x ln x(ln y/ln x) = ln x(ln y/ln x)' = 1(ln x)' + ln x(1/ln x)'ln x = 1/x[1/ln x] + ln x(-1/ln²x)(ln y/ln x)' = 1/x - 1/ln x[/tex]

So, the derivative of y = x ln x is as follows:

[tex]dy/dx = x^(ln x) * [(1/x) - (1/ln x)]dy/dx = x^(ln x - 1) * [(1 - ln x)/x]Thus, 2y' = x^(ln x - 1) * [(1 - ln x)/x] * 2.2y' = 2x^(ln x - 1) * [(1 - ln x)/x].[/tex]

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True. When computing a t statistic, it is necessary to use the sample variance (or standard deviation) to estimate the standard error for the sample mean.

The standard error represents the standard deviation of the sampling distribution of the sample mean. By using the sample variance (or standard deviation), we can estimate the variability of the sample mean from the population mean.

The formula to calculate the standard error of the sample mean is: standard deviation / √(sample size). The sample variance is used to estimate the population variance, and the sample standard deviation is the square root of the sample variance.

The t statistic is computed by dividing the difference between the sample mean and the population mean by the estimated standard error of the sample mean. This t statistic is used in hypothesis testing or constructing confidence intervals when the population parameters are unknown.

Therefore, the sample variance (or standard deviation) is crucial in calculating the estimated standard error, which in turn is necessary for computing the t statistic and making statistical inferences about the sample mean.

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The value of VW which is the missing length of the given triangle VWZ would be = 43.2

To calculate the missing part of the triangle, the formula that should be used is given as follows;

XW/VX = YZ/YV

Where;

XW = 72

YZ = 55

VX = 72+VW

YV = 88

That is;

= 72/72+VW = 55/88

6,336 = 3960+55VW

55VW = 6336-3960

55VW = 2376

VW = 2376/55

= 43.2

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Answer:

Answer for the question is A)

Answer:

A) 3:5 = 12:20

Step-by-step explanation:

The numbers should have the same proportion, so if you multiply the ratio with smaller numbers each by a specific number, it should equal the same ratio as the ratio with the bigger number (or even if you divide the ratio with bigger numbers to see if it equals the ratio with smaller numbers)

Example:

A) multiply 3:5 by 4:

3 x 4 = 12

5 x 4 = 20

Has the same proportion as 12:20, so that expresses a true proportion

B) multiply 14:6 by 2:

14 x 2 = 28

6 x 2 = 12

28:12 does not equal to 28:18, so not the same proportion.

C) multiply 6:2 by 7:

6 x 7 = 42

2 x 7 = 14

42:14 does not equal to 42:7, so not the same proportion.

The perimeter of the triangle is 77 cm.In an isosceles triangle, the two legs are congruent, meaning they have the same length.

Let's assume that the length of each leg is 15 cm.

The perimeter of a triangle is the sum of the lengths of all its sides. In this case, the triangle has two congruent legs with a length of 15 cm each.

So, the perimeter of the triangle can be calculated as follows:

Perimeter = 15 cm + 15 cm + 31 cm

Perimeter = 46 cm + 31 cm

Perimeter = 77 cm

Therefore, the perimeter of the triangle is 77 cm.

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The equation of the hyperbola with Foci: (0, +12), and vertices: (0, +7) is given by:

                      [tex]$\frac{y^2}{49}-\frac{x^2}{95}=1$.[/tex]

Given data:

Foci: (0, +12),

vertices: (0, +7)

We are to find an equation for the hyperbola that satisfies the given conditions.

Let us first plot the given data points on a graph.

Now, we can see that the hyperbola opens upward and downward since the foci are above and below the center of the hyperbola.

So, the standard form of the equation for the hyperbola is:

[tex]\frac{(y-k)^2}{a^2}-\frac{(x-h)^2}{b^2}=1[/tex]

Where (h,k) is the center of the hyperbola.

Let us first find the center of the hyperbola.

The center of the hyperbola is the midpoint of the vertices.

The midpoint is calculated as:

[tex]$$(h,k)=\left(\frac{x_1+x_2}{2},\frac{y_1+y_2}{2}\right)$$[/tex]

                 =  [tex]$$\left(0,\frac{7+(-7)}{2}\right)$$[/tex]

                 =  [tex]$$\left(0,0\right)$$[/tex]

Now that we have found the center of the hyperbola, let us find 'a'.

The distance between the center and the vertices is called 'a'.a = 7

Now, let us find 'b'.

The distance between the center and the foci is called 'c'.c = 12

Since we know the value of a, c, and the formula for finding b is:

b² = c² - a²

b² = (12)² - (7)²

b² = 144 - 49

b² = 95

b = [tex]$\sqrt{95}$[/tex]

Therefore, the equation of the hyperbola is:

[tex]\frac{y^2}{49}-\frac{x^2}{95}=1[/tex]

Thus, we have found the required hyperbola equation.

Thus, the equation of the hyperbola with Foci: (0, +12), vertices: (0, +7) is given by:

                      [tex]$\frac{y^2}{49}-\frac{x^2}{95}=1$.[/tex]

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The equation of the hyperbola that satisfies the given conditions:

Foci: (0, +12), vertices: (0, +7). The standard equation for a hyperbola with the center (h,k) is given by

`(y-k)^2/a^2 - (x-h)^2/b^2 =1`

The distance between the center and the vertices is a, and the distance between the center and the foci is c.

Let's see the graph first:

Here, c=12 (distance between the center and the foci).

And a=5 (distance between the center and the vertices)

Formula:

c² = a² + b²b²

= c² - a²b²

= 12² - 5²b²

= 144 - 25b²

= 119

Therefore, the equation of the hyperbola that satisfies the given conditions is `(y-0)^2/5^2 - (x-0)^2/√119^2 = 1`.(Here, h=0 and k=0).

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After 8 seconds the ball height was 42 units.

It is defined as the graph of a quadratic function that has something bowl-shaped.

It is given that on a game show, contestants shoot a foam ball toward a target. The table includes points along one path the ball can take to hit the target where x is the time that has passed since the ball was launched and y is the height at this time.

It is required to find how high was the ball after 8 seconds.

The orbit of the ball will be a parabola.

We know the standard form of a quadratic function:

[tex]\text{y}=\text{ax}^2+\text{bx}+\text{c}[/tex] where [tex]\text{a}\ne\text{0}[/tex]

At x = 0 and y = 10, we get:

[tex]\sf 10=a(0)^2+b(0)+c[/tex]

[tex]\sf 10=c[/tex]

[tex]\sf c=10[/tex]

At x = 2 and y = 24, we get:

[tex]\sf 24=a(2)^2+b(2)+c[/tex]

[tex]\sf 24=4a+2b+10[/tex]

[tex]\sf 4a+2b=14[/tex]                   ....(1)

At x = 16 and y = 10, we get:

[tex]\sf 10=a(16)^2+b(16)+c[/tex]

[tex]\sf 10=256a+16b+10[/tex]

[tex]\sf 256a+16b=0[/tex]               ....(2)

By solving equations (1) and (2), we get;

a = - 1/2, b = 8 and c = 10

Putting these values in the standard form of a quadratic function, we get:

[tex]\sf y=-\sf \frac{1}{2}x^2 +8x+10[/tex]

Now, after 8 seconds means when x = 8, we get:

[tex]\sf y=-\sf \frac{1}{2}\times 8^2 +8\times8+10[/tex]

[tex]\sf y=-32+64+10[/tex]

[tex]\sf y=42[/tex]

Thus, after 8 seconds the ball height was 42 units.

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The correct option is a) l = 94.78 feet.The angle of elevation of the sun is 34, and the height of a tree is 53 feet

We have to find the length of a shadow cast by the tree, represented by "l".Step-by-step solution:

Let AB be the tree, and BC be its shadow. We can assume that the angle of elevation of the sun is measured from the top of the tree, point A, to the sun, point S.

Therefore, the angle of elevation of the sun is ∠BAS.

Let's use trigonometry to solve for the length of the shadow, "l".tan(∠BAS) = opposite / adjacent tan(34)

= AB / BC

We know that AB = 53.

Therefore,

tan(34)

= 53 / BCB

= 53 / tan(34)B

= 94.78 feet (rounded to two decimal places)

Therefore, the length of the shadow cast by the tree is

l = BC

=94.78 feet, rounded to two decimal places.

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For average number of sunflowers that bloomed over a period ( in months) in Timothy's greenhouse, the number of sunflowers increase linearly because the increasing rate is same for each month. So, option (d) is right one.

We have Timothy's greenhouse where he is growing sunflowers. The table represents the average number of sunflowers that bloomed over a period of four months. We have to check number of sunflowers increase linearly or exponentially. See the table carefully, the number of sunflowers increase with increase of number of months. That is first month number of sunflowers are 15 then 17.2 in next month.

The increasing rate of number of flowers per month = 17.2 - 15 = 2.2 or 19.4 - 17.2 = 2.2 or 21.6 - 19.4 = 2.2

So, the answer is Linearly, because the table shows that the sunflowers increased by the same amount each month. Another way to check is graphical method, if we draw the graph for table data it results a linear graph. Hence, the number of sunflowers increase Linearly.

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Complete question:

Question 2 Multiple Choice Worth 1 points) (03. 08 MC)

Timothy has a greenhouse and is growing sunflowers. The attached table shows the average number of sunflowers that bloomed over a period of four months. Did the number of sunflowers increase linearly or exponentially?

a)Linearly, because the table shows a constant percentage increase in orchids each month

b)Exponentially, because the table shows that the sunflowers increased by the same amount each month

c)Exponentially, because the table shows a constant percentage increase in sunflowers each month

d)Linearly, because the table shows that the sunflowers increased by the same amount each month

To fill the rectangular prism we need 1 cube.

To find the number of cubes needed to fill the rectangular prism, we can calculate the volume of the prism and divide it by the volume of a single cube.

The volume of the rectangular prism is given by the formula:

Volume = Length × Width × Height

Substituting the given values:

Volume = 8 in. × 4 in. × 21 in.

Volume = 672 in³

The volume of a cube is given by the formula:

Volume = Edge Length³

Substituting the given edge length:

Volume of a cube = (14 in.)³

Volume of a cube = 2744 in³

Now, we can divide the volume of the prism by the volume of a single cube to find the number of cubes needed:

Number of cubes = Volume of prism / Volume of a single cube

Number of cubes = 672 in³ / 2744 in³

Calculating this division gives:

Number of cubes ≈ 0.245

Since we cannot have a fraction of a cube, we need to round up to the nearest whole number. Therefore, we would need 1 cube to fill the rectangular prism.

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(a) The complementary solution, yc, for the associated homogeneous equation is yc(x) = C1e^(-3x) + C2e^(2x).

To find the complementary solution, we consider the homogeneous equation associated with the given differential equation, which is obtained by setting the right-hand side of the differential equation to zero. The general form of the complementary solution is in the form yc(x) = C1e^(r1x) + C2e^(r2x), where r1 and r2 are the roots of the characteristic equation. In this case, the characteristic equation is r^2 - 3r + 2 = 0, which has roots r1 = 1 and r2 = 2. Substituting these values into the general form gives us the complementary solution yc(x) = C1e^(-3x) + C2e^(2x).

(b) To find a particular solution, yp, using the method of undetermined coefficients, we assume that yp(x) has the form yp(x) = Ax + Be^(3x).

We assume that the particular solution has the same form as the non-homogeneous term, but with undetermined coefficients A and B. By substituting this assumed form into the original differential equation, we can solve for the coefficients A and B. After solving, we obtain the particular solution yp(x) = 2x + (27/10)e^(3x).

(c) To solve the initial value problem, we combine the complementary and particular solutions: y(x) = yc(x) + yp(x).

Given the initial conditions y(0) = 4, y'(0) = 13, and y''(0) = 33, we substitute these values into the general solution obtained in part (c). After evaluating the equations, we find the particular solution that satisfies the initial conditions: y(x) = (27/10)e^(3x) - (36/5)e^(2x) + 2x + 4.

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there must exist at least one number c between 1 and 6 such that f(c) = 0.

The statement is true.

This statement is based on the Intermediate Value Theorem, which states that if a function is continuous on a closed interval [a, b], and if f(a) and f(b) have opposite signs (f(a) > 0 and f(b) < 0 in this case), then there exists at least one number c in the interval (a, b) such that f(c) = 0.

In the given scenario, we have f(1) > 0 and f(6) < 0. Since the function f(x) is not specified, we don't have information about its continuity. However, assuming f(x) is continuous on the interval [1, 6], we can apply the Intermediate Value Theorem. Therefore, there must exist at least one number c between 1 and 6 such that f(c) = 0.

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