John received a 68%, 72%, and 85% on three of his math tests. After his fourth math test he now has a 79% average. What score di

Question

2 years ago

6

d he have received on his fourth test?
A) 79%
B) 89%
C) 91%
D) 100%

PLEASE EXPLAIN WHY OR I WILL RATE TWO STARS!

2 answers:

Dvinal [7] · Answer 1 · 2022-08-22T13:15:21+03:00

Dvinal [7]2 years ago

8 0

Answer:

68+72+85=225

plus 79 =304 divided by 4 = 76

plus 89 =314 divided by 4 = 78.5

plus 91=316 divided by 4 = 79

so the answer is C

plz brainlest

ArbitrLikvidat [17] · Answer 2 · 2022-08-22T15:15:22+03:00

5 0

Answer:

91%

Step-by-step explanation:

(0.68 + 0.72 + 0.85 + x)/4 = 0.79

(2.25 + x)/4 = 0.79

0.5625 + 1/4x = 0.79

1/4x = 0.2275

x = 0.91 = 91%