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15 votes
15 votes
Can you help me please,I don’t understand

Can you help me please,I don’t understand-example-1
User Vikram Anand Bhushan
by
1.9k points

1 Answer

27 votes
27 votes
Answers are

a) w=52 m

b) L = 97 cm

Step by step

a) the perimeter is 278m, the length is 87m.
We are looking for the width.
We know the formula is P= 2L + 2W

So

278 = (2)(87) + 2W
278 = 174 + 2W
Subtract 174 from both sides to isolate variable
278-174 = 174 -174 + 2W
Combine
104 = 2W
Divide both sides by 2 to solve
104/2 = 2/2 W
52 = W

Check your work

278 = (2)(87) + (2)(52)

278 = 174 + 104

278 = 278
Problem solved!

b) Area of the window is 7081 cm^2, width is 73cm. We are looking for length.

We know the formula for area is
A = L x W

So

7081 = L x 73

Divide both sides by 73 to solve

7081/73 = L x 73/73

97 cm = Length

Check your work

7081 = 97 x 73

7081 = 7081

Problem solved!
User Yellottyellott
by
3.2k points