Mandy wants to earn a 90% overall average in her mathematics class. She has grades of 87, 77, and 94 thus far in the course. What grade does Mandy need to average on the next two assessments to earn a 90% overall average?

It says to round to the nearest whole numbers as needed

treeko Apr 21, 2019

#1**+1 **

Easy to solve these

She currently has 87 + 77 + 94 = 258 points

She needs 5(90) = 450 points for a "90" average

So....on the next two tests....she needs 450 - 258 = 192 points

So....she needs to average 192 / 2 = 96 on the next two tests

CPhill Apr 21, 2019

#2**-2 **

First, multiply 90 by 5 to get 450. Next, evaluate 450-87-77-94. That gets us a total of 192. After that, divide that by 2 to get the average total grade needed to get a 90% average.

**Mandy needs to get an average of 96% on her 2 tests to get a 90% average on her 5 tests.**

~~Hypotenuisance

Hypotenuisance Apr 21, 2019