Question

Keyanna saved $75 this summer by babysitting. After school, she makes $10 a week babysitting.

Answer 1

Given:
Savings : $75
Babysitting earnings : $10 a week.

a) A = $75 + $10w

b) A = $75 + $10 * 5 weeks
    A = $75 + $50 
    A = $125

c) A = $75 + $10w
  $255 = $75 + $10w
  $255 - $75 = $10w
  $180 = $10w 
  $180/$10 = w
   18 = w
Keyanna needs to babysit for 18 weeks.