Posted by **Jazmin** on Thursday, April 11, 2013 at 9:51pm.

Jeremy got scores of 93,82,91, and 88 on his first four math test. What score must he get on the fifth test to have an average test grade of 90 for the five test ?

Can someone explain step by step. Please

- Math -
**Knights**, Thursday, April 11, 2013 at 9:56pm
For average grade of 90, must all add up to the average times the amount of tests.

So, 90*5 = 450

x+ 93+ 82+91+88 = 450

x+(82+88) + (91+93) = 450

x + (170 + 184) = 450

x+ 354 = 450

x+4 + (350) = 450

x+4 = 100

x = 96

- Math -
**Jazmin**, Thursday, April 11, 2013 at 10:14pm
Thank you so much this is better than the way my teacher explained. :)

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