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Natali5045456 [20]
3 years ago
5

This is correct? I need help please :(

Mathematics
2 answers:
Leto [7]3 years ago
8 0

Answer:

well, we only no that

2l + 2w is 80

(lengths and widths on all 4 sides

and that w * l is A

so the function should be w times what's left for l, but also expressed by something with w

2l + 2w = 80 | -2w

2l = 80 -2w | devide by 2

l = 80 - w

now we can substitute l in

A = w * l

so that we only need w's

A(w) = w * (80-w)

for any w it will give us the area, makes only sense for 0<w<80

matrenka [14]3 years ago
6 0
Ye that’s right i think

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