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AveGali [126]
2 years ago
13

Write the expression 5x(x + 9) − 7(x + 9) in complete factored form.

Mathematics
1 answer:
saw5 [17]2 years ago
4 0
B. (5x-7)(x+9)
This method of factoring is grouping. You could take (x+9) out of both the 5x and the -7, and the next step is putting the 5x -7 in its own set of parentheses.
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A cube has a side length of x inches. What expression represents the total volume, in cubic inches, of the cube?
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Answer:

Volume = x^3 cubic inches

Step-by-step explanation:

A cube is the 3D version of a square. Since one side length is x inches, all the other side lengths are same, x inches each.

We know,

Volume = area of base * height

THe base is a square and the area is side * side. We know each side is x, so we have:

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Now, we know height is also same side length, x, thus the volume becomes:

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Volume = x^2*x

We add the exponents when we have same base multiplied, so the expression for volume becomes:

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