Question

Louisa's savings change by -$9 each time she goes bowling.in all it changed by -$99 during the summer.how many times did she go bowling in the summer?

Answer 1

Divide -99 by 9 to find out how many times she went bowling. The answer comes out to be 11. She went bowling 11 times.

Answer 2

She went 11 times.

Explanation:

Given,

The change in saving in each time she goes bowling = -$ 9,

If she goes t times,

The change in saving for going t times = t × change in saving in each time

= t × -9

= -9t dollars,

According to the question,

-9t = -99

`\implies t=(-99)/(-9)=11`

Hence, she went 11 times to bowling.