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12345 [234]
3 years ago
10

Simplify the expression: 7r2+5r2+9r

Mathematics
2 answers:
jenyasd209 [6]3 years ago
4 0

Answer:

9r+7r+9r

Step-by-step explanation:

Komok [63]3 years ago
4 0

Answer:

12r^2+9r

Step-by-step explanation:

You can only add the 7r^2 and the 5r^2. So, once you add them it's as simplified as you can get.

Hope you have a good day! (✿◡‿◡)(((o(*゚▽゚*)o)))

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A customer is ordering brick pavers to cover a rectangular walkway that is 3 feet by 15 feet and a square sitting area
Darina [25.2K]

A customer should buy minimum 16 boxes of pavers.

In this question, a customer is ordering brick pavers to cover a rectangular walkway that is 3 feet by 15 feet and a square sitting area that is 6 feet on a side.

First we find the total area that will be covered by  pavers.

Area of rectangle = length × width

Area of rectangle = 15 × 3

Area of rectangle = 45

And the area of square = side²

             area of square =   6²

             area of square =  36

So, the total area would be,

Total area = area of rectangle + area of square

Total area = 45 + 36

Total area = 81

So, the total area is 81 square feet.

one box of pavers covers 5.28 square feet.

So using unitary method,

81 / 5.28

= 15.534

≈ 16 boxes

This means, approximately 16 boxes will require to cover the above area.

Therefore, the customer should buy minimum 16 boxes of pavers.

Learn more about the Unitary method here:

brainly.com/question/22056199

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1 year ago
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