Answer:
$10
Step-by-step explanation:
The hardcover books are $12 each which would be $60 out of the $100. There are four more paperbacks meaning they would be $10 each and cost $40 total.
I hope this helped!!! :)
Answer:
x = 15
Step-by-step explanation:
the easiest way to do this is 5 times 3 and with that we get 15 :)
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The answer should be 5/a-a=0
Answer:
The mean for the number of matches that they win in the tournament is 20.
Step-by-step explanation:
For each match, there are only two possible outcomes. Either they win, or they do not. The probability of winning a match is independent from other matches. So we use the binomial probability distribution to solve this problem.
Binomial probability distribution
Probability of exactly x sucesses on n repeated trials, with p probability.
The expected value of the binomial distribution is:

The Stomping Elephants volleyball team plays 30 matches in a week-long tournament.
This means that 
On average, they win 4 out of every 6 matches.
This means that 
What is the mean for the number of matches that they win in the tournament?

The mean for the number of matches that they win in the tournament is 20.
Answer:
4/7
Step-by-step explanation:
if you add the 3 and the 1 it makes 4, since the denominators are the same you don't add them you keep them the same