rockabillyEli4363 rockabillyEli4363

08-12-2018
Mathematics

contestada

David received three grades of 85,92, and 100 on his first 3 tests. What must he get on the fourth test to get a 90 average?

Respuesta :

anna2023147 anna2023147

08-12-2018

Answer:

83

Step-by-step explanation:

All you have to do here is set up an equation.

(85+92+100+x)/4=90

Then find x which is his 4th test score

85+92+100+x=360

x=360-85-92-100

x=83

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