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Alekssandra [29.7K]
3 years ago
5

A square has a perimeter of 38 inches we want to know the length of each side? Chose the best model for this problem. (Side leng

th above perimeter four times) (perimeter above length and width) (Side length above perimeter twice) (perimeter above side length four times).
Mathematics
1 answer:
MakcuM [25]3 years ago
4 0

Answer:

perimeter above side length four times

Step-by-step explanation:

we know that

The perimeter of a square is equal to

P=4b

where

b is the length side of the square

Solve the formula by b

That means----> isolate the variable b

Divide by 4 both sides

b=\frac{P}{4}

we have

P=38\ in

substitute

b=\frac{38}{4}=9.5\ in

Rewrite the expression  b=\frac{P}{4}

\frac{P}{b}=4

so

perimeter above side length four times

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Solve for k: A=5k/7y
Mashutka [201]

Answer:

7/5 * A *y =k

Step-by-step explanation:

A=5k/7y

Multiply each side by 7y

A* 7y = 5k/7y * 7y

7Ay = 5k

Divide by 5

7Ay/5 = 5k/5

7/5 * A *y =k

4 0
2 years ago
The manufacturer of the ColorSmart-5000 television set claims 95 percent of its sets last at least five years without needing a
patriot [66]

Answer:

Step-by-step explanation:

Hello!

Your study variable is X: "number of ColorSmart-5000 that didn't need repairs after 5 years of use, in a sample of 390"

X~Bi (n;ρ)

ρ: population proportion of ColorSmart-5000 that didn't need repairs after 5 years of use. ρ = 0.95

n= 390

x= 303

sample proportion ^ρ: x/n = 303/390 = 0.776 ≅ 0.78

Applying the Central Limit Theorem you approximate the distribution of the sample proportion to normal to obtain the statistic to use.

You are asked to estimate the population proportion of televisions that didn't require repairs with a confidence interval, the formula is:

^ρ±Z_{1-\alpha /2}* √[(^ρ(1-^ρ))/n]

Z_{1-\alpha /2} = Z_{0.995} = 2.58

0.78±2.58* √[(0.78(1-0.78))/390]

0.0541

[0.726;0.834]

With a confidence level of 99% you'd expect that the interval [0.726;0.834] contains the true value of the proportion of ColorSmart-5000 that didn't need repairs after 5 years of use.

I hope it helps!

7 0
3 years ago
The slope of a hill next to a highway decreases 2 vertical feet for every 3 horizontal feet away from the highway.
Novay_Z [31]

Slope is the change in Y ( vertical) over the change in X( horizontal).

The slope would be -2 /3

You would multiply the horizontal distance by the slope:

-2/3 x 12 = -8

The answer would be D. v(h)=-2/3h, and the vertical distance is -8 feet.

8 0
2 years ago
Can someone please help?!
weqwewe [10]

Answer:

Plot the points (0,0) and (1,3) to make the line.

Step-by-step explanation:

We know that a linear equation is y=mx+b, m is the slope and b is the y-intercept. We can see that the slope is m=3, and there is no b meaning b=0. Since the y-intercept is 0 we can start from the origin (0,0). The slope is 3/1 or known as rise/run. You go up 3 and go right 1, making the second point (1,3). This should work.

3 0
2 years ago
Multiplicative inverse of 3/7 x 2/7
Ahat [919]

<h3>\frac{ - 7}{3}  \times  \frac{ - 7}{2}</h3>
  • It is the multiplicative inverse of 3/7 × 2/7
6 0
3 years ago
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