SOLUTION: mattis average on her first 3 test was 88 . What score does she need on her fourth test to make her average exactly 90 ?
Algebra ->
Average
-> SOLUTION: mattis average on her first 3 test was 88 . What score does she need on her fourth test to make her average exactly 90 ?
Log On
Question 728977: mattis average on her first 3 test was 88 . What score does she need on her fourth test to make her average exactly 90 ? Answer by richwmiller(17219) (Show Source):
You can put this solution on YOUR website! (3*88+x)/4=90
x=96
another way
88 misses 90 by 2
3*2=6
90+6=96
another way
4*90=360
3*88=264
360-264=96
