Question

Represent the following sentence as an algebraic expression, where "a number" is the letter x. You do not need to simplify.

The cube of twice a number.

Answer 1

Answer: (2x)^3

Work Shown:

x = some unknown number

2x = twice the number

(2x)^3 = cubing the previous result

If you want to simplify this expression, then you would get 8x^3 since 2^3 = 8.