Answer:
1.5
Step-by-step explanation:
The mean is the Middle number.
1 standard deviation in both sides of 7.5 makes it between 6 and 9.
<u>What is the </u><u>"common difference"</u><u> in 6 to 7.5 and from 7.5 to 9?</u>

and

So, we would say the standard deviation is 1.5
Answer choice A is right.
Answer:
I hope this answers your questions.
Explanation:
Divide the number of events by the number of possible outcomes. This will give us the probability of a single event occurring.
I hope this helps!!!!
Answer:
D. 8ab+12a-2b-3
Step-by-step explanation:
You are basically combining like terms
Uhh we need a picture or some more info to help you with that one cheif
Answer:
B. $7.04
Step-by-step explanation:
5.28 / 3 = 1.76
1.76 x 4 = 7.04