Question

Julie is a math tutor. She charges each student $210 for the first 7 hours of tutoring and $20 for each additional hour.

Answer 1

She spent 17 hours tutoring

$210 = 7 hours

$20 x 10 hours = $200

$210 + $200 = $410
7 Hours + 10 Hours = 17 Hours

Answer 2

If she charges $210 for the first 7 hours of tutoring, then for 7 hours our equation is A = 210.

Each additional hour past 7 hours is $20, so we have to find the number of hours past 7, h-7, and multiply it by the $20 charged.
A = 210 + 20(h - 7) ANSWER 1

If we plug in $410 as our A we can find the second answer.
410 = 210 + 20(h - 7)
200 = 20(h - 7)
10 = h - 7
17 = h ANSWER 2