Etjidn
Answered

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

Sagot :

Answer:

79

Step-by-step explanation:

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

75*5=296x

375=296x

x=375-296

x=79

Allenjmathew2121idn

Answer: 50

Step-by-step explanation:

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

[tex]\frac{58 + 88 + 80 + 70 + x }{5}[/tex] = 75

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

296 + x = 375

x = 79

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