Question

Evaluate the expression 3•5x when x =3

Answer 1

3 x 5x
x = 3
5x = 15
3 x 15 = 45

Answer 2

45.

Explanation:

Given: 3×5x when x = 3.

First write in x:

3×5×3, when two digits, or variables are together, there's always a multiplication sign.

Then calculate:

3×5×3

15×3

= 45