SOLUTION: Nick's test average is 85 after 10 weekly test. What must his average be on the last five test of the sememster to bring his average to a 90.

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Question 919444: Nick's test average is 85 after 10 weekly test. What must his average be on the last five test of the sememster to bring his average to a 90.
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
A average on last 5
%28850+%2B+5A%29%2F15+=+90
5A = 90*15- 850
A = 100