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kalebbenton15
06.05.2020 •
Mathematics
Calculate the surface area of the figure
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Ответ:
584
Step-by-step explanation:
25 × 8 + 20 × 8 + 8 × 20 ÷ 2 + 8 × 8 + 20 × 8 ÷ 2 =
Ответ:
xy=40
2x+2y=26
Divide the second equation by two to get:
xy=40
x+y=13
Thus, x=13-y.
We now have (13-x)x=40, so
and
Factoring, we get:
(x-5)(x-8)=0
So, x can be either 5 or 8 (and y will be the other option). Thus, the length and width are 8 and 5.