Question

Pauline spent $7.50 every day for 3 days. Which expression is the best choice to help her determine the total amount of money she spent?

(7.50)(−3) = −22.50; she spent $22.50
(−7.50)(3) = −22.50; she spent $22.50
(−7.50)(−3) = 22.50; she spent $22.50
(7.50)(3) = 22.50; she spent $22.50

Answer 1

Last one. 7.50(3)= 22.50

Answer 2

The correct option is 2.

Explanation:

It is given that Pauline spent $7.50 every day for 3 days.

Amount spent on each day = $7.50

Number of days = 3

Spent amount and expenditure are always negative.

Total amount of money she spent is

`Total =(-7.50)(3)`

On simplification we get

`Total =-22.50`

She spent $22.50 and required expression is (−7.50)(3) = −22.50. Therefore the correct option is 2.