Question

Which is a correct way of evaluating the expression 15x + 30x for x = 2?.

Answer 1

15x + 30x=90 when x=2

Explanation:

15x + 30x plug in 2 for x

15(2) + 30(2)=30 + 60=90

or

15x + 30x=45x plug in 2 for x

45(2)=90