Question 890340
her goal is to maintain an 85% average in her math class.
 so far she has two test scores in algebra, 72 and 89.
 What score must she get on her next test in order for her to meet her goal of maintaining at least an 85% average? 
:
Let x = score on the 3rd test to maintain an 85% average
:
{{{(x+72+89)/3}}} = 85
Multiply both sides by 3
x + 161 = 255
x = 255 - 161
x = 94% on her next test