Which expression can be used to model the phrase "the sum of three and a number"?

Question

A. x * 3
B. 3 - x
C. 3 + x
D. x - 3

Answer 1

The phrase "the sum of three and a number" can be modeled by the expression:

C. 3 + x

This is because the phrase indicates that you need to add three to some unknown number, which we represent as \( x \).