Question

help plzzzz

Skylar's grades on four math tests are 85, 78, 77, and 69. What does Skylar need to score on the next test in order to have a mean score of 80?



83

90

91

Answer 1

\[\frac{85+78+77+69+x}{5}=80\]solve for \(x\)

Answer 2

\(\Large \color{blue}{\rightarrow x + 85 + 78 + 77 + 69 = ? }\)

Answer 3

idk

Answer 4

Ok look first add up the numbers

Answer 5

then tell me what you got

Answer 6

309

Answer 7

hey

Answer 8

help me plzz