Answer :
[tex] \frac{x+75+82+94+77}{5} = 85[/tex]
[tex] \frac{x+328}{5}=85 [/tex]
x + 328 = 5(85)
x + 328 = 425
x = 425 - 328
x = 97
He must score 97 on the next test to have an average of at least 85
[tex] \frac{x+328}{5}=85 [/tex]
x + 328 = 5(85)
x + 328 = 425
x = 425 - 328
x = 97
He must score 97 on the next test to have an average of at least 85