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shmote12
24.06.2021 •
Mathematics
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Ответ:
Given:
A figure of a rectangular prism with length l, width w and height h.
To find:
The surface area of the rectangular prism.
Solution:
The product of twice of the length l and the width w is:
The product of twice of the length l and the height is:
The product of twice of the width w and the height h is:
The surface area of the prism is the sum of (i), (ii) and (iii). So, the expression for the surface area is:
Therefore, the required expression is
.
Ответ:
x + 5y = 7
Step-by-step explanation:
You can find which one is correct by plugging in -3 for each x value and then solving for y.
x + 5y = 7
(-3) + 5y = 7
5y = 10
y = 2
When x = -3, y=2
(2) + 5y = 7
5y = 5
y = 1
When x=2, y=1