SOLUTION: bethany's average for her first four quizzes is 88. If she wants to have an average of 90, what is the lowest score she can get on her fifth quiz?

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Question 812974: bethany's average for her first four quizzes is 88. If she wants to have an average of 90, what is the lowest score she can get on her fifth quiz?
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

average for her first four quizzes is 88. (4*88 = 352 points)

wants to have an average of 90 after the 5th quiz

 %28352%2Bx%29%2F5+=+90

    352 + z = 450

          z = 98