The perimeter means you add up all the sides
so you do
(12b-8) + (12b-8) + (9b+8)
now you just add the like terms
12b+12b+9b = 33b
-8+-8+8= -8
so the perimeter is 33b-8
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Below are the choices:
A.He could change the population mean.
B.He could increase the sample size.
C.He could change the population standard deviation.
<span>D.He could decrease the sample size.
</span>
The answer is C.
Answer:
4/15
Step-by-step explanation:
The total number of spins completed is 6+8+7+9 = 30
The letter B came up 8 times
P(B) = number of B's over total
P(B) = 8/30 = 4/15