Question 253380
at the end of each week, sarah has:


250 + (150*w)


at the end of each week, felicia has:


1650 - (200*w)


w = number of weeks.


at the end of the first week:


sarah has 250 + 1*150 = 400
felicia has 1650 - 1*200 = 1450


at the end of the second week:


sarah has 250 + 2*150 = 550
felicia has 1650 - 2*200 = 1250


etc.