Karl earned scores of 58, 88, 80, and 70 on his first 4 Chemistry tests. What is the minimum score he needs to earn on his fifth

Question

3 years ago

15

test to ensure that his average score for the 5 tests will be at least 75 ?

2 answers:

OLga [1] · Answer 1 · 2022-09-06T14:07:40+03:00

OLga [1]3 years ago

8 0

Answer:

79

Step-by-step explanation:

(58+88+80+70+ x)/5=75

75*5=296x

375=296x

x=375-296

x=79

vichka [17] · Answer 2 · 2022-09-06T15:35:13+03:00

8 0

Answer: 50

Step-by-step explanation:

First let's set up an equation by calling the score he needs to get, x:

$\frac{58 + 88 + 80 + 70 + x }{5}$ = 75

58 + 88 + 80 + 70 + x = 75 x 5

296 + x = 375

x = 79