3 years ago

PLEASE HELP ASAP Answer correctly

Mathematics

1 answer:

givi [52]3 years ago

3 0

Answer:

62,100

Step-by-step explanation:

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alexandr1967 [171]

Let x represent Holly's score on 7th math quiz.

We have been given that the mean of Holly's first six math quiz scores was 75%. This means that the average on 1st 6 math quizzes is 75.

To find the total scores on 1st 6 math quizzes, we will multiply 75 by 6 that is $75\times 6 =450$ .

We will use average formula to find test scores on 7th math quiz.

$\text{Average of 7 math quizzes}=\frac{\text{Sum of scores on 7 math quizzes}}{\text{7 quizzes}}$

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$77\cdot 7=\frac{x+450}{7}\cdot 7$

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Therefore, Molly's score on the 7th math quiz was 89.

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