SOLUTION: Doug received the following scores on his first four tests: 77%, 83%, 89%, and 86%. What score must he get on his fifth test to average 85% for all five tests?

Question 900985: Doug received the following scores on his first four tests: 77%, 83%, 89%, and 86%. What score must he get on his fifth test to average 85% for all five tests?

Found 2 solutions by Jc0110, Alan3354:
Answer by Jc0110(165) (Show Source): You can put this solution on YOUR website!
Let x to be the score for fifth test.

%
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
Doug received the following scores on his first four tests: 77%, 83%, 89%, and 86%. What score must he get on his fifth test to average 85% for all five tests?
------------
85*5 = 425
77 + 83 + 89 + 86 = 335
425 - 335 = 90%
RELATED QUESTIONS
Doug received the following scores on his first four tests: 77%, 83%, 89%, and 86%. What... (answered by rfer)
On his first 5 biology tests, Bob received the following scores: 72, 86, 92, 63, and... (answered by fractalier)
Grimley had scores of 88,92,93, and 89 on his first four algebra tests. What score must... (answered by aaaaaaaa)
A student has scores of 83, 89, 78, and 86 on her first four tests. what score must she... (answered by scott8148)
Thad has scores of 87, 83, and 80 on his first three algebra tests. What score must he... (answered by jim_thompson5910)
Quinn's test scores are 95,90,and 83.what must he score on his next test to have an... (answered by ewatrrr)
Franco's scores on four tests are 93, 85, 100, and 86. What must the score be on the... (answered by addingup)
bill's scores on his first four science tests are 86,,90,84,and 91.what test score must... (answered by josh_jordan)
Tom received 89, 94, 86, and 96 on the first algebra tests. What grade must he receive on (answered by jim_thompson5910)