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solong [7]
3 years ago
5

PLEASE HELP ME I DONT UNDERSTAND.

Mathematics
2 answers:
Bingel [31]3 years ago
5 0

width = 7cm

Length= 41cm

width=x

length=3x+20

96=3x+20+3x+20+x+x

96=8x+40

56=8x

x=8


FrozenT [24]3 years ago
4 0

Rectangle has 4 sides

You have the 2 side lengths (l) and the 2 side widths (w)

"The length is 20 centimeters more than triple the width" in math terms is

l = 20 + 3w

The perimeter is 96 centimeters, which is all the sides added up

2l + 2w = 96

2(20 + 3w) + 2w = 96

40 + 6w + 2w = 96

40 + 8w = 96

8w = 56

w = 7


now plug in w = 7 to get length in

l = 20 + 3w

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