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STatiana [176]
3 years ago
9

-5y y=-2 -3x 6y=-12 substitution

Mathematics
1 answer:
IrinaK [193]3 years ago
5 0
The answer would be x=4 and y=-2.
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There are two calculus classes at your school classes have a class average of 75.5 the first class as a standard deviation of 10
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To compare the two classes, the Coefficient of Variation (COV) can be used.

The formula for COV is this:
C = s / x

where s is the standard deviation and x is the mean

For the first class:
C1 = 10.2 / 75.5
C1 = 0.1351 (13.51%)

For the second class:
C2 = 22.5 / 75.5
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The COV is a test of homogeneity. Looking at the values, the first class has more students having a grade closer to the average than the second class.
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