awarnk
27.08.2021 •
Mathematics
The length of a rectangle is 10 cm more than 3 times the width. The perimeter is 180. What are the dimensions?
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Ответ:
Length = 10 + 3w
Perimeter = 2l + 2w
2 (10 + 3w) + 2w = 180
20 + 6w + 2w = 180
20 + 8w = 180
8w = 180-20
8w= 160
w= 20
Dimensions:
Width = 20 cm
Lengths = (10+3w) = 70 cm
Ответ:
$525
Step-by-step explanation:
72%x=378
0.72x=378
378/.72=525