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sukhopar [10]
4 years ago
15

PLEASE HELP ME WITH THIS PROBLEM IVE BEEN ON IT FOR 3 DAYS NOW!

Mathematics
1 answer:
Len [333]4 years ago
3 0
85 x 3 = 255
 first 2 test grades were 81 and 86:
81 + 86 = 167

Need to find the 3rd to have exact average 85:
255 - 167 = 88

So her 3rd test needs to make 88 to make average of 85

Double check: 81 + 86 + 88 =  255 = 85 + 85 + 85
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Name a value for x that will complete the inequality that is shown. Then, explain why the value makes the inequality true.
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========================================================

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This tells us that x is between 0.125 and 0.180 where x is not equal to either endpoint. We simply need to pick anything in this interval. It can be anything you want (I recommend to use a number line to help pick a value). One such value is 0.157. There are infinitely many values you can select from.

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