The missing value that completes the frequency table is 100
What is a Frequency Table?A frequency table is just a two-column "t-chart" or table that lists all of the potential outcomes and their corresponding frequencies as seen in a sample.
How to solve:
From the graph given,
The battery life(hours) from x = 15 to x= 20 has a frequency of 130
The battery life(hours) from x= 28 to x= 30 has a frequency of 100
It can be inferred that from the battery life of the different models, the missing value is 100 and when you crosscheck the data, you would find this is correct and accurate.
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Factor the expression completely.
−
100
�
5
+
90
−100x
5
+90
The expression [tex]-100^5 + 90[/tex] is completely factored as [tex]-(10^5 + 3)(10^5 - 3)[/tex].
What is an expressiοn?Mathematical expressiοns cοnsist οf at least twο numbers οr variables, at least οne arithmetic οperatiοn, and a statement. It's pοssible tο multiply, divide, add, οr subtract with this mathematical οperatiοn.
The expression [tex]-100^5 + 90[/tex] can be factοred as follows -
Grοup the negative sign with the first term -
[tex]= -(100^5) + 90[/tex]
Evaluate [tex]100^5[/tex] as [tex](10^2)^5 = 10^{10}[/tex] -
[tex]= -(10^{10}) + 90[/tex]
Factor οut a negative sign -
[tex]= -(10^{10} - 90)[/tex]
Factor the difference of twο squares, where [tex]a = 10^5[/tex] and b = 3 -
[tex]= -(10^5 + 3)(10^5 - 3)[/tex]
Therefore, the expressiοn is factored as [tex]-(10^5 + 3)(10^5 - 3)[/tex].
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derek is experimenting with sizes of his square logo. he wants to increase his logo by 2 inches on one side and decrease it by 4 inches on the other side, to create a new, rectangular logo. derek writes the equation: A(x) =(x+2)(x-4). which expression represents the total area of derek’s logo, A(x), in vertex form
The quadratic equation written in vertex form is:
A(x) = x^2 - 4
How to write the equation in vertex form?Here we want to find the vertex form of the quadratic equation:
A(x) = (x + 2)*(x - 2)
Remember that for a quadratic equation with the vertex (h, k) and leading coefficient a is written as:
f(x) = a*(x - h)^2 + k
Now, notice that the zeros of the quadratic function are x = -2 and x = 2.
Then the vertex is just between these two, at x = 0.
Then h = 0, and the y-value of the vertex is what we get when we evaluate in x = 0.
k = (0 + 2)*(0 - 2) = 2*-2 = -4
Then the vertex is (0, -4) and the leading coefficient is 1, we can write the quadratic equation as:
A(x) = (x - 0)^2 -4
A(x) = x^2 - 4
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(2t + 7) (2t -5) solve using identities
Answer:
[tex]4t^{2}+4t-35[/tex]
Step-by-step explanation:
[tex](2t+7)(2t-5)\\4t^{2}-10t+14t-35\\4t^{2}+4t-35[/tex]
Two forces are each applied to an area of 0. 09 m2. The first is applied with a pressure of 90 N/m2, and the second with a pressure of 70 N/m2. Find the difference between the size of the forces
There is a 1.8 N difference between the two forces
To find the difference between the size of the forces applied to two areas with different pressures, we need to use the formula:
Force = Pressure x Area
For the first force, with a pressure of 90 N/m² and an area of 0.09 m², the force can be calculated as:
Force1 = 90 N/m² x 0.09 m² = 8.1 N
For the second force, with a pressure of 70 N/m² and the same area of 0.09 m², the force can be calculated as:
Force2 = 70 N/m² x 0.09 m² = 6.3 N
Therefore, the difference between the size of the two forces is:
Force1 - Force2 = 8.1 N - 6.3 N = 1.8 N
So, the difference between the two forces is 1.8 N. The force with the higher pressure applies a larger force to the area, resulting in a larger force being applied overall.
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2. Consider the parent function f(x) = x. Which transformations occurred to create g(x) = -2]x-81+7?
2
a. vertical translation 7 units up
b. horizontal translation 8 units right
C. vertical translation 7 units down
d. reflection in the x-axis
c.horizontal translation 8 units left
f.reflection in y axis
g.vertical stretch by a factor of 2
h.horizontal stretch by a factor of 2
Answer: The transformations that occurred to create g(x) = -2(x-8)²-81+7 from f(x) = x are:
- Horizontal translation 8 units to the right: The term (x - 8) in the equation of g(x) means that the graph of g(x) has been shifted horizontally 8 units to the right compared to f(x) = x.
- Vertical stretch by a factor of 2: The coefficient -2 in front of the term (x - 8)² means that the graph of g(x) has been vertically stretched by a factor of 2 compared to f(x) = x.
- Vertical translation 81 units down and 7 units up: The terms -81 and +7 in the equation of g(x) mean that the graph of g(x) has been shifted vertically 81 units down and then 7 units up compared to f(x) = x.
Therefore, the correct answer is (a) vertical translation 7 units up.
Step-by-step explanation:
URGENT !!!
Write the multiplication sentence modelled by each diagram.
NEED STEP BY STEP ON HOW TO GET (30pnts) (only need a)
Answer:
Step-by-step explanation:
Post a link to the paper then i will edit it and send it back and then give you the answers on the paper you share with me
Q (6
(611)
Triangle STU with coordinates S(3, 6), T(4,4), and U(5,1) is rotated 90° clockwise. List the
12 (5+1)
coordinates of the new image.
5' (2-6)
The coordinates of the new image are S(3, 6) → (-6, 3), T(4,4) → (-4, 4), and U(5,1) → (-1, 5).
What in geometry is a transformation matrix?For describing a geometric transformation such a translation, rotation, scaling, or shearing, a matrix known as a transformation matrix is utilised. By multiplying the matrix by the column matrix of the original coordinates, the matrix is used to change the coordinates of points in a geometric figure. The modified figure is then drawn using the resultant transformed coordinates.
Given that the coordinates of the point are:
S(3, 6), T(4,4), and U(5,1)
When the figure is rotated by 90 degrees the resultant image has the following coordinates.
(x, y) → (-y, x)
Thus,
S(3, 6) → (-6, 3)
T(4,4) → (-4, 4), and
U(5,1) → (-1, 5)
Hence, the coordinates of the new image are S(3, 6) → (-6, 3), T(4,4) → (-4, 4), and U(5,1) → (-1, 5).
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4x^4+31x^2-90=0
Help
Answer:
The answer would not be 0, it would be -12, and here is why.
4x^4+ 16x+31x^2=62x-90.
In thia case i ignpored the variable, i think its a variable..
You woulkd add 62+16, you get 78.
78-90= -12
A cone has base area 25 mm². A parallel slice 6 mm from the vertex has area 36 mm². Find the height of
the cone.
Therefore , the solution of the given problem of area comes out to be the cone has a 5 millimetre height.
What exactly is area?Calculating how much space would be needed to fully cover the outside will reveal its overall size. When calculating a trapezoidal form's surface, the environs were also taken into account. The surface area of something determines its overall measurements. The amount of edges connecting each of a cuboid's four parallelogram ends reveals how much underground water it can hold.
Here,
Let's name the cone using the details provided:
Its base measures 25 mm2.
A parallel slice 6 mm from the vertex has a 36 mm2 surface.
We can use the fact that the area of a circular slice of a cone is proportional to the square of its distance from the vertex to build up a proportion:
(area of slice) / (base area) Equals (distance from vertex) / (height) 2/ (area from slice)
When we enter the numbers we are aware of, we obtain:
=> 36 / 25 = 6² / h²
If we simplify, we get:
=> h² = (25 * 6²) / 36 = 25
When we square the two edges, we obtain:
=> h = 5
As a result, the cone has a 5 millimetre height.
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Find the amplitude, phase shift, and period of the function.
y = 2 – (1/2) cos (3x+π)
Give the exact values, not decimal approximations. Amplitude: ___
Phase shift: ___
Period: ____
The amplitude οf the functiοn is 1/2, the phase shift is (-π)/3, and the periοd is 2π/3.
What is Phase Shift?Phase shift simply means that the twο signals are at different pοints οf their cycle at a given time.
The given functiοn is y = 2 – (1/2) cοs (3x+π).
We can see that the general fοrm οf this functiοn is y = A cοs (Bx - C) + D, where A is the amplitude, B is the frequency, C is the phase shift, and D is the verticaI shift.
Cοmparing the given functiοn with the general fοrm, we can see that:
A = 1/2
B = 3
C = -π
D = 2
Therefοre, the amplitude is |A| = 1/2.
The phase shift is given by C/B = (-π)/3.
The periοd οf the functiοn is given by T = 2π/B = 2π/3.
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Find the Rank of matrix by reducing to nomal form. A=[[2,3,-1,-1],[1,-1,-2,-4],[3,1,3,-2],[6,3,0,-7]]
4
The rank of a matrix can be determined by converting it to its reduced row echelon form. It is also known as the row reduced echelon form or simply the reduced echelon form. The rank of a matrix is the number of non-zero rows in its reduced row echelon form. The given matrix is,
`A=[[2,3,-1,-1],[1,-1,-2,-4],[3,1,3,-2],[6,3,0,-7]]`
We need to convert the given matrix to its reduced row echelon form. It is done by applying elementary row operations on the matrix. The elementary row operations are as follows:
- Interchange the order of two rows.
- Multiply a row by a non-zero scalar.
- Add a multiple of one row to another row.
Let us apply these operations on the given matrix,
`[[2,3,-1,-1],[1,-1,-2,-4],[3,1,3,-2],[6,3,0,-7]]`
`= [R1, R2, R3, R4]`
`R1 → R1 - R2/2` (subtract half of R2 from R1)
`R2 → R2 - R1/2` (subtract half of R1 from R2)
`R3 → R3 - 3R1/2` (subtract three times half of R1 from R3)
`[[1,5/2,1/2,1/2],[0,-3/2,-5/2,-9/2],[0,-7/2,3/2,-7/2],[0,0,-3,-6]]`
`= [R1, R2, R3, R4]`
`R2 → -R2/3` (multiply R2 by -1/3 to make its first entry as 1)
`R3 → R3 - 7R2/3` (subtract 7 times -1/3 of R2 from R3)
`R4 → -R4/3` (multiply R4 by -1/3 to make its first entry as 1)
`[[1,5/2,1/2,1/2],[0,1,5/3,3/2],[0,0,-4/3,-4],[0,0,1,2]]`
`= [R1, R2, R3, R4]`
`R3 → -3R3/4` (multiply R3 by -3/4 to make its third entry as 1)
`[[1,5/2,1/2,1/2],[0,1,5/3,3/2],[0,0,1,1],[0,0,1,2]]`
`= [R1, R2, R3, R4]`
`R4 → R4 - R3` (subtract R3 from R4 to make its third entry as 0)
`[[1,5/2,1/2,1/2],[0,1,5/3,3/2],[0,0,1,1],[0,0,0,1]]`
`= [R1, R2, R3, R4]`
The given matrix is converted to its reduced row echelon form. The last row contains only a single non-zero entry, hence the rank of the matrix is 4.
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why does the decimal point always have to move when you rewrite a percent as a decimal and when you rewrite a decimal as a percent?
Answer:
When you rewrite a percent as a decimal, you need to move the decimal point two places to the left because a percent is a ratio that compares a number to 100. For example, 50% is the same as 50/100 or 0.5. To convert 50% to a decimal, you need to divide 50 by 100, which gives you 0.5. Moving the decimal point two places to the left achieves the same result.
Similarly, when you rewrite a decimal as a percent, you need to move the decimal point two places to the right because a percent expresses a number as a fraction of 100. For example, 0.75 is the same as 75/100 or 75%. To convert 0.75 to a percent, you need to multiply it by 100, which gives you 75. Moving the decimal point two places to the right achieves the same result.
Step-by-step explanation:
whats the missing side lengths!
Answer:
x = 3[tex]\sqrt{2}[/tex] , y = [tex]\frac{3\sqrt{2} }{2}[/tex]
Step-by-step explanation:
this is a 90- 45- 45 isosceles triangle with legs congruent , that is
y = [tex]\frac{3\sqrt{2} }{2}[/tex]
using Pythagoras' identity in the right triangle
x² = ( [tex]\frac{3\sqrt{2} }{2}[/tex] )² + y²
= ( [tex]\frac{3\sqrt{2} }{2}[/tex] )² + ( [tex]\frac{3\sqrt{2} }{2}[/tex] )² = 9 + 9 = 18 ( take square root of both sides )
x = [tex]\sqrt{18}[/tex] = [tex]\sqrt{9(2)}[/tex] = [tex]\sqrt{9}[/tex] × [tex]\sqrt{2}[/tex] = 3[tex]\sqrt{2}[/tex]
Do you know the answer?
Answer:
A. No Solution
B. Unique Solution (0,0)
Step-by-step explanation: When you are dealing with a system of equations and they have the same variables with the same coeffiencts adding up to different numbers, it is unsolvable and therefore has no-solution. When you are dealing with two y-values equaling different amounts of x-values, 0 satisfy both varaibles.
If you approach this from a graphing perspective, you can put both equations in the system into slope intercept form.
System A:
Line 1: 3x + 5y = 8
5y = -3x + 8
y = -3/5 x + 8/5
Line 2: 3x + 5y = 7
5y = -3x + 7
y = -3/5 x + 7/5
Because both lines have the same slope, but different y-intercepts, the lines are parallel and will never intersect. This is why there is no solution to the system.
System B:
Line 1: y = 7x is in slope intercept form.
Line 1: y = 3x is in slope intercept form.
Since these lines have different slopes, they are guaranteed to intersect only once. There is a single solution.
If you graph these lines, they will intersect at the origin, at (0,0), since that is a common point on both lines.
Compare representing points in the table and in the coordinate plane?
(7,9) ,(9,7), (0,6), (3,8), (7,5), (8,3), (6,0), (9,10), (5,2), (2,5)
The points (7,9), (9,7), (0,6), (3,8), (7,5), (8,3), (6,0), (9,10), (5,2), and (2,5) can be represented in a table with two columns - one for the x-coordinate and one for the y-coordinate. This format is useful for organizing and manipulating data, but it does not provide a visual representation of the location of the points.
On the other hand, a coordinate plane is a visual tool that allows us to plot and view the location of points in two-dimensional space. The x-axis and y-axis intersect at the origin (0,0), and each point is represented by a unique combination of x and y coordinates. This format is particularly useful for understanding the relationships and patterns among the points.
A table lists the coordinates of points in a tabular format, a coordinate plane allows us to plot and visualize the location of points in two-dimensional space.
Representing points in a table and in a coordinate plane are two common ways to visually display data. While a table lists the coordinates of points in a tabular format, a coordinate plane is a graphical representation that allows us to plot and visualize the location of points in two-dimensional space.
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The area of a semicircle is 0.1413 square meters. What is the semicircle's radius?
[tex]\textit{area of a semicircle}\\\\ A=\cfrac{\pi r^2}{2} ~~ \begin{cases} r=radius\\[-0.5em] \hrulefill\\ A=0.1413 \end{cases}\implies 0.1413=\cfrac{\pi r^2}{2}\implies 0.2826=\pi r^2 \\\\\\ \cfrac{0.2826}{\pi }=r^2\implies \sqrt{\cfrac{0.2826}{\pi }}=r\implies 0.30\approx r[/tex]
One angle of a triangle measures 10°. The other two angles are in a ratio of 3:14. What are the measures of those two angle
Answer: Let's denote the two unknown angles as x and y.
We know that the sum of the three angles in a triangle is 180 degrees. So we can set up the following equation:
10 + 3x + 14x = 180
Simplifying the equation:
17x = 170
x = 10
Now we can use the ratio of the other two angles to find the value of y:
3:14 can be simplified as 3x:14x or x:4.67x
So y is 4.67 times larger than x:
y = 4.67x = 4.67(10) = 46.7
Therefore, the measures of the two unknown angles are x = 10 degrees and y = 46.7 degrees.
Step-by-step explanation:
The measure of the remaining two angles are 46.7
What is the angle sum property of a triangle?The angle sum property of a triangle states that the sum of interior angles of a triangle is 180°
Given here, One angle of a triangle measures 100°. the other two angles are in a ratio of 3:14. Then let the measure of the angles be 3x and 14x
thus using the angle sum property we have
[tex]3x+14x=80[/tex]
[tex]17x= 80[/tex]
[tex]x = 46.7[/tex]
Hence, The measure of the remaining two angles are 46.7
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If you have the following data about a bag of chips, about
how many chips are estimated to be in the bag?
Mass of Chips + Bag = 369 grams
Mass of 25 Chips = 45 grams
Mass of Bag ONLY = 28 grams
Approximately, how many chips are in the bag?
Answer:
189 chips are estimated to be in the bag.
Step-by-step explanation:
Subtracting the massMass of Chips = Mass of Chips + Bag - Mass of Bag
Mass of Chips = 369 g - 28 g
Mass of Chips = 341 g
Dividing the massMass of 1 Chip = Mass of 25 Chips / 25
Mass of 1 Chip = 45 g / 25
Mass of 1 Chip = 1.8 g
Dividing the mass of chips in the bag by the mass of one chipNumber of Chips = Mass of Chips / Mass of 1 Chip
Number of Chips = 341 g / 1.8 g
Number of Chips ≈ 189
What is the area of a sector with a central angle of 180° and a diameter of 21.2 cm?
Use 3.14 for πand round your final answer to the nearest hundredth.
Enter your answer as a decimal in the box.
cm²
The area of the sector with a central angle of 180° as required to be determined in the task content is; 176.41 cm².
What is the area of the sector described?It follows from the task content that the sector in discuss has a central angle of 180° and a diameter of 21.2 cm.
Recall the area of a sector is;
Area, A = (theta/360) × πr²
where r = diameter / 2
r = 21.2/2
r = 10.6 cm.
A = (180/360) × 3.14 × 10.6²
Area, A = 176.41 cm².
Ultimately, the area of the sector is; 176.41 cm².
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Please refer to the photo
Any help or clarification is appreciated
The equivalent expression is 9b^6/a^4c^6
What is an equivalent expression?An equivalent expression is a mathematical expression that has the same value as another expression, even though it may be written differently. Equivalent expressions can be useful in simplifying complex mathematical expressions or in solving equations by replacing a complex expression with a simpler, equivalent one.
In algebra, two expressions are considered equivalent if they simplify to the same expression, or if they have the same solution set when solved.
We have that;
(-3ab^2c^-3/a^3b^-1)^2
9a^2b^4c^-6/a^6b^-2
9a^-4b^6c^-6
9b^6/a^4c^6
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suppose that a factory produces light bulbs and the percentage of defective lightbulbs is 3.5%. if a sample of 550 light bulbs is selected at random, what is the probability that the number of defective bulbs in the sample is greater than 15?
The probability that the number of defective bulbs in the sample is greater than 15 is 0.401, or 40.1%.
This is a binomial distribution problem with n=550 and p=0.035. We want to find the probability that the number of defective bulbs in the sample is greater than 15, which can be written as P(X > 15), where X is the number of defective bulbs in the sample.
Using the binomial probability formula, we have:
P(X > 15) = 1 - P(X ≤ 15)
P(X ≤ 15) = Σi=0¹⁵ (550 chooseᵃ) * 0.035ᵃ * (1-0.035)⁵⁵⁰⁻ᵃ
We can use software or a calculator with a binomial probability distribution function to find this sum, which is approximately 0.599.
Therefore, the probability that the number of defective bulbs in the sample is greater than 15 is:
P(X > 15) = 1 - P(X ≤ 15) ≈ 1 - 0.599 = 0.401
So the probability that more than 15 bulbs in the sample are defective is approximately 0.401, or 40.1%.
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Nicholas calculated the volume of the prism his work is shown below. (or above)
where, if any, did Nikolas first make a mistake in his work?
A) Nikolas used the wrong measurements when finding the area of the base.
B) Nicholas used the wrong formula for the volume of the prism.
C) Nicholas made a computational error.
D) Nicholas did not make a mistake.
Answer:
D.
Step-by-step explanation:
Nikolas did not make a mistake. The formula to calculate volume of a triangular prism is
[tex]V=Bh[/tex]
where B is the area of the base and h is the height.
The area of the triangular base is [tex](0/5)(5.8)(6.2) = 17.98[/tex].
[tex]Bh = 17.98 * 9.2 = 165.416 ft^3[/tex]
A cylinder has a height of 23 m and a volume of 18,488 m³. what is the radius of the cylinder? round your answer to the nearest whole number. responses 256 m 256 m 50 m 50 m 32 m 32 m 16 m
Answer:
Step-by-step explanation:
The volume for a right cylinder is
[tex]V=\pi r^2h[/tex]
We are given all the values except the radius, so we plug them in as follows:
[tex]18488=\pi r^2(23)[/tex]
Begin by dividing by 23π to get
255.8657603 = r²
and then take the square root of both sides to find that
r = 15.995 or 16 m
AC method factoring requires the polynomial to be
5 melons cost £3.50
7 melons cost £5
Are the number of melons and the cost in direct proportion? Explain how you know.
.m
(2 marks)
****
yes, it is direct proportion becuz in direct proportion if the prize of one quantity increases the other too will have to increase. here in this question as you can see 5melons were costing 3.50 and on increasing it to 7 melons cost is too increasing soo it is a direct proportion.
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3. a. Explain why we can find the area of a 4-cm-by 8 -cm rectangle by multiplying \( 4 \cdot 8 \) by showing how to create equal groups in the situation. b. Discuss how to relate your explanation in p
Therefore , the solution of the given problem of area comes out to be 4-cm by 8-cm rectangle, we can keep adding rows of four-square units.
What exactly is an area?Its total size can be determined by figuring out how much room would be required to completely cover the outside. The surroundings are also taken into consideration when determining this same surface that has a trapezoidal shape. Something's total dimensions are determined by its surface area. The volume of water that a cuboid can contain inside depends on the number of edges that are present between its four trapezoidal extremities.
Here,
A 4-cm by 8-cm rectangle has an area
=> 4⋅8=32
square centimetres when its length and breadth are multiplied. Starting with a row of four tiny squares,
we can then layer another row of four tiny squares on top of it. We now have a total of 8 tiny squares, which together measure 4 by 2 centimetres.
Then, after the first two rows, add a third row of four little squares to complete the procedure.
We now have a total of 12 little squares, which together make a rectangle measuring 4 centimetre by 3 cm.
Up until we have 32 small squares in total, which make up the complete 4-cm by 8-cm rectangle, we can keep adding rows of four-square units.
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3. Find the constant proportionality for the table and writ in the form
of y=mx.
Boxes of Candy (x)
9
10
Pieces of Candy (y) 150 135
2
6
3
30 90 45
a. Figure the slope/rate and put it in the formula where slope/rate
goes.
b. Why would you need to know the rate of pieces of candy per
box? Make up a job or reason you would need to know this rate
and write in complete sentences.
The constant proportionality is 15, which means that for every box of candy, there are 15 pieces of candy. The equation is 15x.
What is constant and variable?A variable in mathematics is a sign that denotes a value that may vary, as opposed to a constant, which is a set number that never changes. Variables are used to represent unknown or changing quantities, such as time (t) or the distance (d) travelled by an item, whereas constants are used to represent fixed numerical values, such as pi or the speed of light (c). In contrast to variables, which are often represented by lowercase letters, constants are typically represented by capital letters. In mathematical equations and formulae, the distinction between constants and variables establishes which values are fixed and which values are subject to change.
The slope of line is given as:
m = (change in y) / (change in x)
Substitute the values from the table:
m = (135 - 150) / (9 - 10) = -15/-1 = 15
For the equation to be of the form y = mx we have:
y = mx + b
150 = 15(10) + b
b = 0
Substituting the values the equation is:
y = 15x
Hence, the constant proportionality is 15, which means that for every box of candy, there are 15 pieces of candy. The equation is 15x.
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C=9 when p=7 write an equation for c in terms of p
The equation for c in terms of p is c = (9/7)p. To obtain this equation, we use the given values of C and p to find the constant of proportionality.
We know that c and p are directly proportional, which means that c = kp for some constant k. We can find k by plugging in the given values:
9 = k(7).We can solve this system of equations for k by using elimination or substitution. Solving for k, we get
k = 9/7.Thus, the equation for c in terms of p is
c = (9/7)p.
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Show that abcd is a trapezoid
Slope AB = slope CD = 1/1 and slope BC ≠ slope DA. Therefore, AB and CD are parallel sides, and ABCD is a trapezoid.
Describe Trapezoid?In geometry, a trapezoid (also known as a trapezium in some countries) is a quadrilateral with at least one pair of parallel sides. The parallel sides are called the bases of the trapezoid, and the other two sides are called the legs.
The trapezoid can be classified into three types based on the positions of the bases:
Isosceles trapezoid: A trapezoid in which the non-parallel sides are congruent.
Right trapezoid: A trapezoid in which one of the angles formed by the legs is a right angle.
Scalene trapezoid: A trapezoid in which none of the sides are congruent.
The area of a trapezoid can be calculated by the formula:
A = (b1 + b2)h/2
where b1 and b2 are the lengths of the bases and h is the height of the trapezoid (the perpendicular distance between the bases).
To show that ABCD is a trapezoid, we need to demonstrate that it has at least one pair of parallel sides. One way to do this is to calculate the slopes of the line segments that connect the vertices.
The slope of a line passing through two points (x1, y1) and (x2, y2) is given by:
slope = (y2 - y1) / (x2 - x1)
Using this formula, we can calculate the slopes of the four line segments:
slope AB = (4 - 1) / (2 - (-1)) = 3/3 = 1
slope BC = (1 - 4) / (3 - 2) = -3/1 = -3
slope CD = (-3 - 1) / (-3 - 3) = -4/-6 = 2/3
slope DA = (1 - (-3)) / (-1 - (-3)) = 4/2 = 2
We can see that slope AB = slope CD = 1/1 and slope BC ≠ slope DA. Therefore, AB and CD are parallel sides, and ABCD is a trapezoid.
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Calculate to the nearest 0.1, the sizes of beta and gamma.
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By using trigοnοmetric functiοns, the sizes οf β and γ, tο the nearest 0.1, are β ≈ 24.0 degrees and γ ≈ 63.4 degrees
What are trigοnοmetric functiοns?The basic trigοnοmetric functiοns are:
Sine (sin): the ratiο οf the length οf the side οppοsite an angle tο the length οf the hypοtenuse οf the triangle.
Cοsine (cοs): the ratiο οf the length οf the side adjacent tο an angle tο the length οf the hypοtenuse οf the triangle.
Tangent (tan): the ratiο οf the length οf the side οppοsite an angle tο the length οf the side adjacent tο the angle.
Fοr the first right triangle:
Using the trigοnοmetric functiοn tangent, we have:
tan(β) = οppοsite side / adjacent side
tan(β) = 9/20
Taking the inverse tangent οf bοth sides, we get:
β = tan⁻¹(9/20)
Using a calculatοr, we can find that:
β ≈ 24.0 degrees
Fοr the secοnd right triangle:
Using the trigοnοmetric functiοn cοsine, we have:
cοs(γ) = adjacent side / hypοtenuse
cοs(γ) = 6/15
Taking the inverse cοsine οf bοth sides, we get:
γ = cοs⁻¹(6/15)
Using a calculatοr, we can find that:
γ ≈ 63.4 degrees
Therefοre, the sizes οf β and γ, tο the nearest 0.1, are:
β ≈ 24.0 degrees
γ ≈ 63.4 degrees
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