SOLUTION: Your test scores for the semester are 87, 84, and 85. Can you raise your test average to 90 with your next test? Define the variable and write an equation. Then solve.

Algebra ->  Average -> SOLUTION: Your test scores for the semester are 87, 84, and 85. Can you raise your test average to 90 with your next test? Define the variable and write an equation. Then solve.       Log On


   

Question 666246: Your test scores for the semester are 87, 84, and 85. Can you raise your test average to 90 with your next test? Define the variable and write an equation. Then solve.
Answer by ReadingBoosters(3246) About Me  (Show Source):
You can put this solution on YOUR website!
x = score needed on 4th test
%2887%2B84%2B85%2Bx%29%2F4+=+90
Solve for x
%28256+%2B+x%29%2F4+=+90
...
Multiply both sides by 4
256 + x = 360
x = 360 - 256
highlight_green%28x+=+104%29
Only with bonus points!
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