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ariel8308
04.02.2020 •
Mathematics
Mr morgan owns an ice cream shop. his hop made $1,380 last weekend. mr. morgan charges $2 for each scoop of ice cream. about how many scoops of ice cream were sold last weekend?
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Ответ:
Ответ:
98
Step-by-step explanation
First, we need to give the next test a variable since we don't know what it is yet. We will name it "x". Since you are trying to find the average, you will have to add all 6 tests together and then divide it by 6 since there are 6 quizzes.
The equation would be:
82.5+84+88.5+92.5+94.5+x ≥ 90
6
Then, you should closely but not completely simplify that to:
442+x ≥ 90
6
Next, multiply each side by 6. Cancelling the "6" on the left:
442+x ≥ 540
Lastly, subtract 442 from each side of the equation. The 442 on the left cancels out, leaving x alone, and on the left, 540 minus 442 is 98:
x ≥ 98
Thus, Li has to earn at least a 98 on his next quiz in order to have an average of at least a 90. :)
-Question answered by Angelina M.
8th grade student