The z-scοre is prefer tο have cοmpared tο yοur cοmpetitοrs fοr the time it tοοk yοu tο cοmplete the race is -2.50.
What is z-scοre?When a value is given a Z-scοre, it shοws hοw far οff frοm the standard deviatiοn it is. The amοunt οf standard deviatiοns a given data pοint is abοve οr belοw the mean is represented by the Z-scοre, alsο knοwn as the standard scοre. The level οf variability within a particular data cοllectiοn is effectively reflected in the standard deviatiοn.
We knοw that ,
=> z=(x-µ)/σ
If we have z scοre less it means we cοmplete the race in less time as cοmpare tο οthers.
Sο, z scοre -2.50 is least as per given all the οptiοns. sο ,we wοuld yοu prefer -2.50 cοmpared tο οur cοmpetitοrs fοr the time it tοοk yοu tο cοmplete the race.
Hence the z-scοre is -2.50.
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Same items have same prices.
Different items have different prices.
1. How much is a helmet?
2. How much is a bell?
3.How much is a lock?
4. Explain how you figured out the prices.
Answer:
Helmet = 29, Bell = 10, Lock = 24
A ship travels east from Port Lincoln 24 miles before turning north. When the ship becomes disabled
and radios for help, the rescue boat needs to know the fastest route to the ship. The rescue boat navigator
finds that the shortest route from Port Lincoln is 48 miles long. At what angle off of due east should the
rescue boat travel to take the shortest route to the ship? Round your answer to the nearest whole degree.
Answer:
Rounding to the nearest whole degree, the rescue boat should travel at an angle of approximately 41 degrees off of due east to take the shortest route to the ship.
Step-by-step explanation:
We can use trigonometry to solve this problem. Let's draw a diagram to represent the situation:
A (rescue boat)
| \
| \
| \ C (disabled ship)
24 mi | \
| \
| \
|θ \
B-----------D (Port Lincoln)
48 mi
In the diagram, point B represents Port Lincoln, point C represents the disabled ship, and point A represents the rescue boat. Point D is the intersection of the eastward path and the northward path taken by the ship.
We are given that BD = 24 miles and CD = 48 miles. We want to find the angle θ, which is the angle between the line segments AB and AD.
To find θ, we can use the law of cosines:
cos(θ) = (BD² + CD² - AD²) / (2 x BD x CD)
Substituting the given values, we get:
cos(θ) = (24² + 48² - AD²) / (2 x 24 x 48)
Simplifying, we get:
cos(θ) = 0.75
To solve for θ, we can take the inverse cosine of both sides:
θ = cos⁻¹(0.75)
Using a calculator, we get:
θ ≈ 41.41°
Rounding to the nearest whole degree, the rescue boat should travel at an angle of approximately 41 degrees off of due east to take the shortest route to the ship.
Need help this is due in an hour. Please help. :)
By answering the presented question, we may conclude that Thus function f(x) = y = (5, 7, 1, 4, 9, 5, 3, 2) and x = (3, 8, 9, 13, 10, 6, 5, 4).
what is function?Mathematicians examine numbers and their variations, equations and associated structures, forms and their locations, and prospective positions for these things. The term "function" refers to the relationship between a collection of inputs, each of which has a corresponding output. A function is a connection of inputs and outputs in which each input leads to a single, identifiable outcome. Each function is assigned a domain, a codomain, or a scope. The letter f is widely used to denote functions (x). The symbol for entry is an x. The four primary types of accessible functions are on functions, one-to-one capabilities, so multiple capabilities, in capabilities, and on functions.
A. Assume f(x) = (4x - 7). To obtain the inverse of f(x), we must swap x and y in the function and solve for y.
As a result, g(x) = (x + 7)/4 is the inverse of f(x).
B. We must demonstrate that f(g(x)) = x for any x in g's domain.
f(g(x)) = f((x + 7)/4) = 4((x + 7)/4) - 7 = x + 7 - 7 = x + 7 - 7 = x.
As a result, f(g(x)) = x, confirming that g(x) is really the inverse of f. (x).
C. Assuming the function:
| x | 5 8 9 13 10 6 5 4 |\s|—-|—-|—-|—-|—-|—-|—-|—-|\s| f(x) | 3 7 1 4 9 5 3 2 |
Thus f(x) = y = (5, 7, 1, 4, 9, 5, 3, 2) and x = (3, 8, 9, 13, 10, 6, 5, 4).
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Write the expression as the sine, cosine, or tangent of an angle.
The simplified expression is: cos(13π/35)
What is trignometry?Trigonometry is a branch of mathematics that studies the relationships between angles and the sides of triangles. It deals with functions such as sine, cosine, and tangent and their inverses, and is used extensively in fields such as engineering, physics, and astronomy.
We can simplify the given expression using the identity:
cos(A - B) = cos(A) cos(B) + sin(A) sin(B)
We can rewrite the given expression as:
cos(4π/7) cos(π/5) - sin(4π/7) sin(π/5)
= cos(4π/7 - π/5) [using the identity]
To simplify further, we can find a common denominator for 4/7 and 1/5:
4/7 = 20/35 and 1/5 = 7/35
Then, we can write:
4π/7 - π/5 = (20π/35) - (7π/35) = 13π/35
This expression cannot be further simplified using trigonometric identities, and is written only in terms of the cosine function.
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You can invest in taxable bonds that are paying a yield of 9.1 percent or a municipal bond paying a yield of 7.35 percent. Assume your marginal tax rate is 21 percent. a. Calculate the after-tax rate of return on the taxable bond? (Round your percentage answers to 2 decimal places. (e.g., 32.16)) b. Which security bond should you buy?
The after-tax rate of return on a taxable bond is calculated by multiplying the pre-tax yield by one minus the tax rate. In this case, it would be 9.1% x (1 - 0.21) = 7.19%. The municipal bond is tax-free, so its after-tax rate of return is equal to its pre-tax yield of 7.35%. Therefore, you should buy the municipal bond as it has a higher after-tax rate of return than the taxable bond.
Use the double angle identities to find the following value.
If cosθ = √10/8 and 3π/2 < θ < 2π, find sin2θ
Answer:
We can use the double angle identity for sine to find sin2θ:
sin2θ = 2sinθcosθ
Since cosθ = √10/8 and 3π/2 < θ < 2π, we know that θ is in the fourth quadrant, where sine is negative. We can use the Pythagorean identity to find the value of sinθ:
sin²θ + cos²θ = 1
sin²θ = 1 - cos²θ
sinθ = -√(1 - cos²θ)
Substituting the value of cosθ, we get:
sinθ = -√(1 - (√10/8)²) = -√(1 - 5/16) = -√(11/16) = -√11/4
Now we can plug in the values of sinθ and cosθ into the double angle identity for sine:
sin2θ = 2sinθcosθ = 2(-√11/4)(√10/8) = -√110/16 = -√(11/4)(10/16) = -√(55/8)
Therefore, sin2θ = -√55/8 when cosθ = √10/8 and 3π/2 < θ < 2π.
Lin has 27 marbles. He divides them into 3 equal groups and gives 1 group to Jill. Jill then gives 2 of hers away. How many marbles does Jill have now?
Answer: 7 marbles
Step-by-step explanation:
Lin starts with 27 and creates 3 equal groups.
When separating, you divide.
27 divided by 3 is 9.
Each group has 9 marbles.
This means that by giving one group to Jill, she receives 9 marbles.
Jill gives away 2 of her 9 marbles, thus leaving her with 7 marbles.
9-2=7.
for which equation is x=5 a solution
a. 2+x=3
b. 3x=15
c. x/2=10
d. x-7=12
Pleace write how do you get the answer full explanation Pleace
Answer: b
Step-by-step explanation:
Okay, so what you need to do is plug in the 5 for x in all equations. once you do that, then you’ll see if the statement makes sense.
A would be= 2 + 5 = 3 and that would be 7=3 which it doesn’t
B would be 3(5)=15 and that would be 15=15
C would be 5/2=10 and thats not true because that would be 2.5=10
And lastly D would be 5-7=12 and that's nit true because that would be -2=12 and that's not true
PLEASE HELP ASAP will give brainliest
Let's use variables to represent the width and length of the rectangle:
Let w be the width of the rectangle (in cm)
Then, the length of the rectangle can be expressed as 5w - 18 (since it is 18 cm less than five times its width).
The area of the rectangle can be calculated as:
A = w * (5w - 18)
We are given that the area of the rectangle is 35 square cm. Substituting this value into the equation above, we get:
35 = w * (5w - 18)
Expanding the right-hand side, we get:
35 = 5w^2 - 18w
Rearranging the terms and setting the equation equal to zero, we get:
5w^2 - 18w - 35 = 0
To solve for w, we can use the quadratic formula:
w = (-b ± sqrt(b^2 - 4ac)) / 2a
where a = 5, b = -18, and c = -35.
Plugging in the values, we get:
w = (-(-18) ± sqrt((-18)^2 - 4(5)(-35))) / 2(5)
w = (18 ± sqrt(784)) / 10
w = (18 ± 28) / 10
So w = 2.6 or w = -1.4
Since the width cannot be negative, we reject the solution w = -1.4.
Therefore, the width of the rectangle is approximately 2.6 cm.
To find the length, we can use the expression we derived earlier:
length = 5w - 18
length = 5(2.6) - 18
length = 13 - 18
length = -5
Since the length cannot be negative, we know that there is an error in our calculation. We made an assumption that the width is less than the length, which is not necessarily true. We should check our work and try again using the positive root instead of the negative one.
Using the positive root for the width, we get:
w = (18 + 28) / 10
So w = 4.6
Therefore, the width of the rectangle is 4.6 cm.
To find the length, we can use the expression we derived earlier:
length = 5w - 18
length = 5(4.6) - 18
length = 23 - 18
length = 5
So the length of the rectangle is 5 cm.
Therefore, the dimensions of the rectangle are width = 4.6 cm and length = 5 cm.
Help with math problems
The solutions to the absolute value inequalities 1 to 20 are shown below
Solving the absolute value inequalities|x + 8| < 16
So, we have
-16 < x + 8 < 16
-24 < x < 8
|r + 1| ≤ 2
So, we have
-2 ≤ r + 1 ≤ 2
-3 ≤ r ≤ 1
|2c - 1| ≤ 7
So, we have
-7 ≤ 2c - 1 ≤ 7
-6 ≤ 2c ≤ 8
-3 ≤ r ≤ 4
Using the above as a guide, the solution to the other inequalities are
-3 < h < 5No solutionNo solutionr < -8 and r > 4k < 1 and k > 7h ≤ -3 and h ≥ 6p ≤ -3 and h ≥ 2No solutionAll set of real valuesn ≤ -5.25 and n ≥ 3.75-0.8 ≤ t ≤ 1.6-6 < h < 5p ≤ -14 and p ≥ 22No solutionAll set of real values-3 < r < 1p < -4 and p > -1Read more about inequalities at
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Help with math problems
The graph of inequalities are attached accordingly.
What are graph of inequalities and what value do they provide in real life?Graphs of inequalities are visual representations of solutions to inequality equations.
These graphs consist of shaded regions on a coordinate plane that indicate all the points that satisfy a given inequality. In real life, graphs of inequalities are used in many areas, including business, finance, and science.
For example, a company may use a graph of inequalities to determine the feasible production and pricing strategies that will maximize profits. Similarly, a biologist may use a graph of inequalities to analyze the optimal conditions for the growth of a particular species. The graphs of inequalities provide a quick and easy way to understand and visualize complex mathematical relationships.
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HELP ASAP WILL GIVE 100 POINTS AND BRAINLYEST IF YOU DON"T ANSWER WITH THE INTENT TO ANSWER CORRECTLY I WILL REPORT YOU
√49 is a perfect square and therefore rational.
√50 is also a perfect square and therefore rational.
∛127 is a non perfect cube and therefore irrational.
∛125 is rational because it is equal to a whole number.
What is a perfect square?It can be expressed as the product of two equal integers. Perfect squares are also known as 'whole squares' or 'complete squares'.
√49 is a perfect square and therefore rational.
This is because the square root of 49 can be expressed as a common fraction 7/7. The square root of 49 = 7, which is a whole number.
√50 is also a perfect square and therefore rational.
The square root of 50 can be expressed as a common fraction 5/5. The square root of 50= 5, which is a whole number.
∛127 is a non perfect cube and therefore irrational.
This is because the cube root of 127 cannot be expressed as a common fraction. The cube root of 127 = approximately 4.9, which is not a whole number.
∛125 is rational because it is equal to a whole number.
The cube root of 125 can be expressed as a common fraction 5/5. The cube root of 125 = 5, which is a whole number.
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want points? ANSWER NOW.
The expression 3x − 10 represents the time it takes a commuter to travel in the morning to work. The expression 12x + 8 represents the time it takes a commuter to travel in the evening from work. What is the total travel time?
15x − 2
9x − 2
15x + 2
9x + 2
Answer: 15x-2 (answer A)
Step-by-step explanation:
To find the total travel time, we need to add the time it takes to travel in the morning and the time it takes to travel in the evening:
Total travel time = (3x - 10) + (12x + 8)
Simplifying the expression by combining like terms, we get:
Total travel time = 15x - 2
Therefore, the total travel time is 15x - 2. So, the answer is (a) 15x - 2.
Answer:
Step-by-step explanation:
The expression 3x − 10 represents the time it takes a commuter to travel in the morning to work. The expression 12x + 8 represents the time it takes a commuter to travel in the evening from work. What is the total travel time?
15x − 2
9x − 2
15x + 2
9x + 2
the answer is (a) 15x-2 hope that helps :)
twice a number plus three times a second number is negative one. the first number plus four times the second number is two
Answer:
Step-by-step explanation:
Let [tex]x,y[/tex] be the two numbers. Then we get
[tex]2x+3y=-1[/tex] [tex](a)[/tex]
[tex]x+4y=2[/tex] [tex](b)[/tex]
We solve equations [tex](a)[/tex] and [tex](b)[/tex] simultaneously:
equation [tex](b)\times2[/tex] :
[tex]2x+8y=4[/tex] [tex](c)[/tex]
[tex](c)-(a)[/tex] gives:
[tex]5y=5\rightarrow y=1[/tex]
Sub [tex]y=1[/tex] into [tex](a)[/tex] :
[tex]2x+3\times1=-1\rightarrow2x=-4\rightarrow x=-2[/tex]
The solution is -2,1
In the given polygon EFGHIJ if JG = 12 cm JD = 10 cm, JC 8 cm, JA = 5 = cm JB = 3 cm then find the area E of the polygon. EA, IB, FC and DH are perpendiculars drawn on the diagonal JG.
We may use the trapezoid area formula to get the areas of trapezoids EJFG, FGHJ, and HJIE. The entire area of polygon EFGHIJ may then be calculated by adding these regions together.
To begin, we must determine the lengths of segments JF, JH, JE, and JI. We can get these lengths using the Pythagorean theorem: JF = (JG2 - FG2) = (122/102) = 44 = 211 cm JH = (JG2 - GH2) = (122) - 82 = √80 = 4√5 cm JE =(JF2 - EF2) =(21112 - 52) =(44 - 25) = 19 cm JI = (JH2 - IH2) = (452 - 32) = (80 - 9) = 71 cm We can now calculate the trapezoidal areas: Trapezoid area EJFG = (JE + JF) * FG / 2 = (211 + 19) * 5 / 2 = 511 + 519 cm2 Trapezoid area FGHJ = (FG + GH + JF) + JH) * HJ / 2 = (10 + 8 + 211 + 45) * 12 / 2 = 120 + 1211 + 245. HJIE = (JI + JE + IH + HE) trapezoid area * JH / 2 = (√71 + √19 + 3 + 3) * 4√5 / 2 = 10√5 + 2√71 cm^2 Lastly, we may sum these areas to calculate the total area of polygon EFGHIJ: E = trapezoid area EJFG + trapezoid area FGHJ + trapezoid area HJIE E = (5√11 + 5√19) + (120 + 12√11 + 24√5) + (10√5 + 2√71) E = 5√11 + 5√19 + 120 + 12√11 + 24√5 + 10√5 + 2√71 E = 120 + 15√11 + 34√5 + 15√19 + 2√71 E ≈ 372.9 cm^2 As a result, the area of polygon EFGHIJ is 372.9 square centimeters.
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Write an equation to represent the cost to make one item of clothing based on how many hours it takes to make it
Answer: Let's assume that the cost to make one item of clothing is directly proportional to the number of hours it takes to make it. We can use the equation:
Cost = k * Hours
where "Cost" is the cost to make one item of clothing, "Hours" is the number of hours it takes to make one item of clothing, and "k" is the proportionality constant that relates the cost to the number of hours.
In other words, if it takes x hours to make one item of clothing, then the cost to make one item is:
Cost = k * x
The value of k will depend on factors such as the cost of materials, the wages of the workers, and other expenses involved in the production process. The value of k can be determined based on the actual cost and number of hours for a particular item of clothing.
Step-by-step explanation:
The midpoint of AB is M(-6,-4). If
the coordinates of A are (-4, -3), what
are the coordinates of B?
[tex]~~~~~~~~~~~~\textit{middle point of 2 points } \\\\ A(\stackrel{x_1}{-4}~,~\stackrel{y_1}{-3})\qquad B(\stackrel{x_2}{x}~,~\stackrel{y_2}{y}) \qquad \left(\cfrac{ x_2 + x_1}{2}~~~ ,~~~ \cfrac{ y_2 + y_1}{2} \right) \\\\\\ \left(\cfrac{ x -4}{2}~~~ ,~~~ \cfrac{ y -3}{2} \right) ~~ = ~~\stackrel{\textit{\LARGE M} }{(-6~~,~~-4)} \\\\[-0.35em] ~\dotfill\\\\ \cfrac{ x -4 }{2}=-6\implies x-4=-12\implies \boxed{x=-8} \\\\[-0.35em] ~\dotfill\\\\ \cfrac{ y -3 }{2}=-4\implies y-3=-8\implies \boxed{y=-5}[/tex]
Let A denote the event of placing a $1 straight bet on a certain lottery and winning. Suppose that, for this particular lottery, there are 2,352 different ways that you can select the four digits (with repetition allowed)
in this lottery, and only one of those four-digit numbers will be the winner. What is the value of P(A)? What is the value of P(A)?
What is the value of P(A)?
P(A)= (Round to five decimal places as needed.)
What is the value of P(A)?
P(A)=(Round to five decimal places as needed.)
Answer:
The probability of winning the lottery, denoted by P(A), can be calculated as follows:
P(A) = number of winning outcomes / total number of possible outcomes
Since there is only one winning four-digit number and there are 2,352 possible four-digit numbers, we have:
P(A) = 1/2352
Using a calculator, we get:
P(A) ≈ 0.00042
Therefore, the value of P(A) is approximately 0.00042 or 4.2 × 10^(-4) (rounded to five decimal places).
Step-by-step explanation:
PLEASE HELP ASAP!!! I REALLY NEED IT, THANK YOU
I'm pretty sure that this is correct I'm sorry I tried my best
Write 9/11 in the form √a where a is an integer to be found.
Answer:
To write 9/11 in the form √a, we need to simplify the fraction so that it has a square root in the numerator or the denominator. We can do this by multiplying the numerator and denominator by √11:
9/11 × (√11/√11) = (9√11)/(11√11) = (√(9 × 11))/(√(11 × 11)) = √99
Therefore, 9/11 can be written in the form √99, where a = 99.
At a Halloween sale, every item in the store is advertised as one-fourth off the original price. If an item is marked with a sale price of $150, what was its original price? Show or explain how you got your answer.
Answer:
$200.00
Step-by-step explanation:
We are asking what is 75% of what number is 150. If we take off 1/4 or 25% we are leaving on 3/4 or 75%
.75 x = 150 Divide both sides by .75
[tex]\frac{.75x}{.75}[/tex] = [tex]\frac{150}{.75}[/tex]
x = 200
Check:
200 x .25 = 50 To find the discount.
200 - 50 = 150 Subtract the discount from the original price to find the sale's price.
Helping in the name of Jesus.
a₁ = -3,
an=3an-1+5
for
n>2
The sum of the first 10 terms in the sequence is 195.The sequence given above is an arithmetic sequence.
What is an arithmetic sequence?
An arithmetic sequence is a sequence of numbers in which each successive number is found by adding a fixed number, called the common difference, to the previous number in the sequence. The common difference is the same for each pair of consecutive numbers.
An arithmetic sequence is a sequence of numbers where each successive number is obtained by adding a fixed amount, the common difference, to the preceding number. In this particular sequence, the common difference is 5.
The first term in the sequence is a₁ = -3, and the general term is an = 3an-1 + 5, where n > 2. To find any term in the sequence, we can use the formula an = a₁ + (n - 1)d, where d is the common difference. In this case, a₁ = -3 and d = 5, so the formula becomes an = -3 + (n - 1)5.
To find the 9th term in the sequence, we can substitute n = 9 into the above formula and solve for an. This gives us an = -3 + (9 - 1)5 = -3 + 40 = 37. Therefore, the 9th term in the sequence is 37.
To find the sum of the first 10 terms in the sequence, we can use the formula Sₙ = (n/2)(2a₁ + (n - 1)d). In this case, a₁ = -3 and d = 5, so the formula becomes Sₙ = (n/2)(2(-3) + (n - 1)5). Substituting n = 10 into the formula gives us Sₙ = (10/2)(2(-3) + (10 - 1)5) = (10/2)(-6 + 45) = (10/2)(39) = 195. Therefore, the sum of the first 10 terms in the sequence is 195.
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Right Question:-
a₁ = -3,
an=3an-1+5
for
n>2.
For given sequence, Find the sum of first 10 terms?
PLEASE HELP! I NEED IT FOR A PRACTICE TEST!!
The wοrk dοne in pushing the car up the incline is 39,672 fοοt-pοunds.
What is Dοt Prοduct?The dοt prοduct is a mathematical οperatiοn that takes twο vectοrs and prοduces a scalar. It is the prοduct οf the magnitudes οf the twο vectοrs and the cοsine οf the angle between them.
Tο calculate the wοrk dοne, we need tο find the fοrce applied tο the car and the distance it was mοved.
First, let's calculate the fοrce required tο push the car up the incline. We can use the weight οf the car and the angle οf the incline tο find the fοrce required.
The weight οf the car is given as 1850 pοunds. The fοrce required tο push the car up the incline is equal tο the cοmpοnent οf the weight that acts parallel tο the incline. This is given by:
fοrce = weight * sin(angle)
where the angle is 7 degrees.
Plugging in the values, we get:
fοrce = 1850 * sin(7) = 220.4 pοunds
Nοw, we need tο find the distance that the car was pushed up the incline. This is given as 180 feet.
Using the dοt prοduct, the wοrk dοne can be calculated as:
wοrk = fοrce * distance * cοs(angle)
where the angle is the angle between the fοrce and the displacement vectοrs. In this case, the fοrce and displacement are in the same directiοn, sο the angle is 0 degrees and cοs(0) = 1.
Plugging in the values, we get:
wοrk = 220.4 * 180 * cοs(0) = 39,672 fοοt-pοunds
Therefοre, the wοrk dοne in pushing the car up the incline is 39,672 fοοt-pοunds.
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find the area when the circumference = 6 pi
Answer:
9π
Step-by-step explanation:
if the circumference=6π, then you can solve for the radius. C=2πr
6π=2πr
Divide 2π from both sides to get r=3
Area=πr^2
A=π*9
Area= 9π
It is suggested that the sequence 21, 1kkak=+...produces only prime numbers.
The answers to each question are:
(a) a1 = 3, a2 = 5, a4 = 17 are prime numbers.
(b) 9 is not a prime number,
What are the prime numbers?
A prime number is a positive integer greater than 1 that has no positive integer divisors other than 1 and itself. In other words, it can only be divided evenly by 1 and itself. Examples of prime numbers include 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, and so on.
(a) [tex]a_{k} = 2 ^ k + 1[/tex]
[tex]a_{1} = 2^1 + 1 = 3[/tex]
[tex]a_{2} = 2 ^ 2 + 1 = 5[/tex]
[tex]a_{4} = 2 ^ 4 + 1 = 17[/tex]
a1, a2, a4 are prime numbers.
(b) We know when k = 3 an [tex]a_{3} = 2 ^ 3 + 1 = 9[/tex].
9 is not a prime number, it can be divide by 3 * 3 so the Sequence does not always produce a prime number.
Hence, the answers to each question are:
(a) a1 = 3, a2 = 5, a4 = 17 are prime numbers.
(b) 9 is not a prime number,
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Complete question:
It is suggested that the sequence [tex]a_{k} = 2 ^ k + 1[/tex], k...I produces only prime numbers.
(a) Show that a, a, and a, produce prime numbers.
(b) Prove by counter-example that the sequence does not always produce a prime number.
help me fast How many inches are in 5 feet?
12 inches
36 inches
60 inches
72 inches
Answer:
60 inches
Step-by-step explanation:
5 ft x 12 in/ft = 60 in
The sum of 6 and b is at most - 17.
An arch of a walkway
can be modeled by
y = -0.04x², where x
and y are measured in
meters. Find the height
and width of the arch
when the arch meets
the ground at the points
(-10, 4) and
(10, — 4).
-10 -8 -6
-2
АУ
6
8
10 x
The width of the arch is 20 meters and the height of the arch is 0 meters.
How can the height of an arch be determined?The height of an arc is the sagitta. It is the line perpendicular to the chord's midpoint and to the arc itself.
The equation for the arch is provided as y = -0.04x2. The junction points (-10, 4) and (10, -4) can be used to calculate the arch's width and height.
The breadth of the arch, which is equal to the separation between the two x-intercepts, is first determined:
Width is equal to 10 minus 10 metres.
Then, we determine the arch's height, which is its highest point. We know that the largest value of y occurs at the parabola's vertex since the equation for the arch has the form y = ax2, where an is a negative constant. The vertex's x-coordinate is provided by the formula x = -b/2a, where a = -0.04 and b = 0. (since there is no linear term in the equation). The vertex's x-coordinate is as a result:
x = -b/2a = -0/2(-0.04) = 0
We change x = 0 in the equation of the arch to obtain the equivalent y-coordinate of the vertex.
y = -0.04x² = -0.04(0)² = 0
As a result, the parabola's vertex is (0, 0), and the arch's greatest height is 0 metres.
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use rational exponents to rewrite and simplify the expression
The solution of the given problem of expressions comes out to be ⁶√x⁷*∛x² = [tex]x^{(11/6)[/tex].
What dοes an expressiοn actually mean?Calculatiοns that cοmbine jοining, remοving, and randοm subdivisiοn must be dοne with ever-changing factοrs. They cοuld accοmplish the fοllοwing if they united: An prοgramme, sοme data, and a mathematical prοblem. Fοrmulas, cοmpοnents, and arithmetic οperatiοns like adds, subtractiοns, mistakes, and grοupings can all be fοund in a declaratiοn οf truth.
Here,
Using rational exponents, it is possible to formulate the expression 6x7*x2 more concisely:
=> ⁶√x⁷*∛x² = [tex]x^{(7/6)} \times x^{(2/3)[/tex]
Now, we can include the exponents to further simplify:
=> [tex]x^{(7/6)} * x^{2/3)} = x^{(7/6 + 2/3)[/tex]
We can add 3 and 6 to discover a common denominator of 18 for the numbers 6 and 3. Then, we could type:
=> [tex]x^{(7/6 + 2/3)} = x^{(21/18 + 12/18)}[/tex]
We can now multiply the exponents:
=> [tex]x^{(21/18 + 12/18)} = x^{(33/18)[/tex]
Further reducing the exponent, we can write:
=> [tex]x^{(33/18) }= x^{(11/6)[/tex]
Therefore, in simplified version, ⁶√x⁷*∛x² = [tex]x^{(11/6)[/tex].
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A spinner is divided into seven equal sections numbered 1 through 7 If the spinner is spun twice, what is the theoretical probability that it lands on 2 and then an odd number?
A) 1/49
B) 4/49
C) 1/7
D) 4/7
The prοbability οf getting either 2 οr οdd number is B)4/49.
What is prοbability?Prοbability is a way οf calculating hοw likely sοmething is tο happen. It is difficult tο prοvide a cοmplete predictiοn fοr many events. Using it, we can οnly fοrecast the prοbability, οr likelihοοd, οf an event οccurring. The prοbability might be between 0 and 1, where 0 denοtes an impοssibility and 1 denοtes a certainty.
Here the Tοtal number οf οutcοmes = 7
When spinner is spun first we can get οn favοrable οutcοme , which is 2 οr οdd number.
If prοbability οf getting 2
=> Number οf favοrable οutcοme/Tοtal number οf οutcοme
=> 1/7
Nοw number οf οdd number frοm 1 tο 7 = 4
Prοbability οf getting οdd number in secοnd spun = 4/7
Then prοbability οf getting either 2 οr οdd number = [tex]\frac{1}{7}\times\frac{4}{7}[/tex] = [tex]\frac{4}{49}[/tex].
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