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insens350 [35]
3 years ago
8

3/4, find the surface area

Mathematics
1 answer:
Semmy [17]3 years ago
4 0

Answer:

1,350 cm^2

Step-by-step explanation:

It's a cube so all faces/bases are the same.

15 × 15 = 225

225 × 6 = 1,350

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The area of a rectangle is 56 cm. The length is 2cm more than x and width is 5 cm less than twice x. Solve for x. Round to the n
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Area = Length * Width = l * w
l = x + 2
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Area = 2x^2 -x  - 10 = 56
Area = 2x^2 - x - 66 = 0 Now you have to factor this thing.
Area = (2x + 11)( x - 6) = 0 This is more or less done by guessing. 
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x = 6.

Check
=====
l = x + 2
l = 6 + 2
l = 8

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w = 2*6 - 5
w = 12 - 5
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