3 years ago

What is the surface area of the cube with the given edge length, s?

2 answers:

8 0

A cube has 6 sides.
first calculate the area of 1 side and then multiply it by 6

the area for one side = S^2 ( or SxS)

15^2 = 15 x 15 = 225 square inches

now multiply that by 6:
225 x 6 = 1350 square inches total

the answer is B.

ddd [48]3 years ago

3 0

Answer:

B. 1350 in^2

Step-by-step explanation:

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3 years ago

If a+b=5 and a-b=4 then b^2-a^2 =

Anna007 [38]

Answer:

$a + b = 5 \\ a \: = 5 - b \\ a - b = 4 \\ 5 - b - b = 4 \\ 5 - 2b = 4 \\ 5 - 4 = 2b \\ 1 = 2b \\ \frac{1}{2} = \frac{2b}{2} \\0.5 = b \\ b = 0.5 \\ a = 5 - b \\ = 5 - 0.5 \\ = 4.5 \\ {a \: }^{2} - {b}^{2} = ( {4.5}^{2}) - ( {0.5}^{2} ) \\ = 20.25 - 0.25 \\ = 20 \\ {a}^{2} - {b}^{2} = 20$