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monsurviky
14.07.2019 •
Mathematics
To get a b in math, alexandria pappas must average 80 on five tests. scores on the first four tests were 84 , 78 , 82 , and 79 . what is the lowest score that she can get on the last test and still get a b?
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Ответ:
The formula for averaging things is (a+b+c+d)/4 (because there are 4 items being added.)
So we want the average to be 80, so we set things equal to 80.
Let the score for the unknown test score be x.
80 = (84+78+82+79+x)/5
400 = 84+78+82+79+x
x = 77
The lowest possible score Alexandria can get is 77 points.
Ответ:
65
Step-by-step explanation:
180-61-54 and that gives you the answer. hope it helps you