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Kamila [148]
2 years ago
15

Calculate the distance Colt walks if he walks 7/8 mile each day for days. Write and solve a multiplication equation.

Mathematics
2 answers:
MrRa [10]2 years ago
8 0

Answer:

he walks 7/8 miles for x days (but this question is not possible without the amount of days :/ )

Step-by-step explanation:

7/8 : x

goblinko [34]2 years ago
3 0

Answer:

I attached an image below :)  please mark my answer branliest!

Step-by-step explanation:

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3w = 30 .... What is the solution of this equation?
uranmaximum [27]

Answer:

3w = 30

w = 30/3

therefore w = 10

8 0
3 years ago
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To fit between two windows, the width of a bookshelf must be no greater than feet. Mrs. Aguilar purchases a bookshelf that is 77
EastWind [94]

The distance between the windows is not given. I have searched for this question in other sources and came up with 6.5 ft.

6.5 ft = 78 inches

The width of the bookshelf  = 77 inches

Hence the book shelf with fit between the windows and still there will be 78-77  = 1 inch of space remaining

Hence the right option is option C


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3 years ago
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Jocelyn is training for a race by running several miles each day. she tracks her progress by recording her average speed in minu
Luden [163]

Finding the regression equation, her average speed on the 9th day should be expected to be of 6.92 minutes per mile.

<h3>How to find the equation of linear regression using a calculator?</h3>

To find the equation, we need to insert the points (x,y) in the calculator.

Researching the problem on the internet, the values of x and y are given as follows:

  • Values of x: 1, 2, 3, 4, 5, 6.
  • Values of y: 8.2, 8.1, 7.5, 7.8, 7.4, 7.5.

Hence, using a calculator, the equation for the average minutes per mile after t days is given by:

V(t) = -0.15143t + 8.28

Hence, for the 9th day, t = 9, hence the estimate is:

V(9) = -0.15143(9) + 8.28 = 6.92 minutes per mile.

More can be learned about regression equations at brainly.com/question/25987747

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4 0
1 year ago
The National Center for Education Statistics reported that 47% of college students work to pay for tuition and living expenses.
Luden [163]

Using the z-distribution, it is found that the 95% confidence interval for the proportion of college students who work to pay for tuition and living expenses is: (0.4239, 0.5161).

If we had increased the confidence level, the margin of error also would have increased.

<h3>What is a confidence interval of proportions?</h3>

A confidence interval of proportions is given by:

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

In which:

  • \pi is the sample proportion.
  • z is the critical value.
  • n is the sample size.

In this problem, we have a 95% confidence level, hence\alpha = 0.95, z is the value of Z that has a p-value of \frac{1+0.95}{2} = 0.975, so the critical value is z = 1.96. Increasing the confidence level, z also increases, hence the margin of error also would have increased.

The sample size and the estimate are given as follows:

n = 450, \pi = 0.47.

The lower and the upper bound of the interval are given, respectively, by:

\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.47 - 1.96\sqrt{\frac{0.47(0.53)}{450}} = 0.4239

\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.47 + 1.96\sqrt{\frac{0.47(0.53)}{450}} = 0.5161

The 95% confidence interval for the proportion of college students who work to pay for tuition and living expenses is: (0.4239, 0.5161).

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5 0
1 year ago
What quadrilateral always has 4 congruent angles and opposite sides that are congruent and parallel? Please answer it correctly.
ololo11 [35]

Answer:

<u>Square</u>

Step-by-step explanation:

Requirements that make a square, a square;

  • Four sides
  • Congruent angles (all 90°)
  • Opposite sides are congruent/the same.
  • Opposite sides are also parallel because the lines of a square do not intersect.
6 0
2 years ago
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