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Olenka [21]
3 years ago
10

Answer and get brainliest

Mathematics
1 answer:
Nitella [24]3 years ago
5 0

Answer:

b

Step-by-step explanation:

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A rectangle has a length 3 times the width. What is the perimeter in terms of x?
Marina CMI [18]

Answer:

Perimeter is equal to all four sides added together.

Length = 3W; L=3W

So

P = 2(W) + 2(L)  substitute the equation for length above you get

P = 2(W) + 2(3W)  and combine

P = 2W + 6W = 8W; put in what the perimeter is and solve for W

66 = 8W, so W = 8.25

W = 8.25, L = 24.75

7 0
3 years ago
Josephine can correct her students' test papers in 9 hours, but if her teacher's assistant helps, it would take them 7 hours. Ho
kirill [66]

Using the together rate, it is found that it would take the assistant 31 hours and 30 minutes to do it alone.

<h3>What is the together rate?</h3>

It is the sum of each separate rate.

In this problem, the rates are given as follows:

  • Josephine: 1/9.
  • Assistant: 1/x.
  • Together: 1/7.

Hence:

\frac{1}{9} + \frac{1}{x} = \frac{1}{7}

\frac{x + 9}{9x} = \frac{1}{7}

9x = 7x + 63

2x = 63

x = 31.5.

It would take the assistant 31 hours and 30 minutes to do it alone.

More can be learned about the together rate at brainly.com/question/25159431

7 0
2 years ago
Add and reduce 2/7+ 16/21=
max2010maxim [7]

Answer:

6/7

Step-by-step explanation:

8 0
3 years ago
Question 13 * A farmer can plant 45 kg of peanuts on 4,000 square metres of land. Which of the following represents the number o
shtirl [24]
Answer: 765/8





Explanation: your mom told me lastnight
7 0
2 years ago
Read 2 more answers
Help pls with 10 and 11
Alex
10
A) 24 ribbons

B)1/28yards

11.u have 1/2 how?

6 0
3 years ago
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