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RSB [31]
2 years ago
7

PLEASE HELP IM STRUGGLING AND IM FAILING GEOMETRY

Mathematics
1 answer:
Vlad1618 [11]2 years ago
8 0

Answer:

2.6 m

Step-by-step explanation:

The surface area for rectangular prisms is: S = 2lw + 2lh + 2wh, where l = length, w = width, h = height.

Substitute the known values into this equation: h = 5, l = 10, w = x, S = 178

178 = 2(10x) + 2(5 x 10) + 2 (5x)

Simplify!

178 = 20x + 100 + 10x

Subtract 100 from both sides and combine x's

78 = 30x

divide both sides by 30

x = 2.6 m

answer check: 2(10 x 2.6) + 2(5 x 10) + 2 (5 x 2.6) = 178 (true!)

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