Asked by sasha

a student wants to get an average of 80 on the 5 tests to earn an A grade.on the 4 test he gets 79, 88,64,78. how much should he score on the 5th test so that he gets this average of 80?
Answered by Reiny
(79+88+64+78+newtest)/5 = 80

solve for "newtest"
Answered by Emily
Let's say the score of the 5th test her is x. To get an average of something, you add everything up and divide by the number of numbers (in this case, tests), right? So, this is how you would set this one up:

79+88+64+78+x
------------- = 80
5

Can you solve the rest?
Answered by Ms. Sue
The student needs a total of 400 points on 5 tests to get an average of 80.

He has a total of 309 on the first four tests. What score does he need on the fifth test to bring his total up to 400?
Answered by sasha
still don't get it
Answered by Ms. Sue
Check my answer below.
Answered by Anonymous
91
Answered by Jeremiah
What is the next step after adding and dividing?
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