SOLUTION: for each of the last months Oliver has saved 75,96, and 84. Which is the minimum he should save next month to have an average savings of 90 per month for these 4 months

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: for each of the last months Oliver has saved 75,96, and 84. Which is the minimum he should save next month to have an average savings of 90 per month for these 4 months       Log On


   

Question 958749: for each of the last months Oliver
has saved 75,96, and 84. Which is the minimum he should save next month to have an average savings of 90 per month for these 4 months
Answer by macston(5194) About Me  (Show Source):
You can put this solution on YOUR website!
To average 90 over 4 months, the sum of his savings must be 4(90)=$360.
The sum the first three months is 75+96+84=255.
$360-$255=$105 He must save $105 the fourth month to average $90 per month.