Question

Which phrase matches the algebraic expression below?

3(x + 4) - 6

A. Three times a number plus four minus six.
B. Three times a number minus four minus six.
C. Three times the difference of a number and four minus six.
D. Three times the sum of a number and four minus six.

Answer 1

D

Explanation:

first express the contents of the parenthesis, then the multiplier, then the subtraction.

x + 4 ← sum of a number and 4

3(x + 4) ← three times the sum of a number and four

3(x + 4) - 6 ← three times the sum of a number and four minus 6