Question

Five friends go to the movies. They each pay $9 to get in and $8 for a popcorn and drink combo.

a) Write two different expressions to find the total cost of the outing.

b) Evaluate each expression. Which expression was easier to evaluate? Justify your choice.

Answer 1

x=5(9+8)

add 9+8 to get 17

multiply 17 by 5

answer: $85

(5x9)+(5x8)=x

multiply 5x9 to get 45

multiply 5x8 to get 40

add 45 and 40

answer: $85

The first expression was easier to evaluate because it required less steps.

Hope this helps :)