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Please help with number 7!

Please help with number 7!-example-1

1 Answer

6 votes

Answer:

He needs at 79

Explanation:

He will be taking 6 quizzes.

Let x be the score on the final quiz

The average is found when we add up all the scores and divide by the number of scores

Average = (88+100+95+78+88+x) /6

The average is 88

88 = (88+100+95+78+88+x) /6

Multiply by 6 on each side

88*6 = (88+100+95+78+88+x) /6 *6

528 = (88+100+95+78+88+x)

Combine like terms

528 = 449+x

Subtract 449 from each side

528-429 = 449-449+x

79 =x

He needs at 79

User Arnaud P
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