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
C2 = 0.2980 (29.80%)
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.
Regina can take yoga classes at community center as it would cost her less money.
Step-by-step explanation:
No. of classes per week = 2
Classes in 6 weeks = 2*6 = 12 classes
Cost of classes at community center = $72
Additional one time fee = $12
Total cost at community center = 72+12 = $84
Cost per class at local gym = $8
Cost of 12 classes = 12*8 = $96
Regina can take yoga classes at community center as it would cost her less money.
Keywords: addition, multiplication
Learn more about addition at:
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I think the answer will be D.
Answer:
-7
Step-by-step explanation:
y−x=9 ⇒ y=x+9
10+2x=−2y
5+x= -y ====== replacing y with x+9
5+x= -x-9
2x= -14
x= -7
I always use Algebra Mathaway or Math Papa
