S=Sado M=Masochism = sadomasochism
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A term is a number or the product of a number and variable(s).
I don't know... 147 meatballs in sauce? :)
average means _ + _ = _ then you divide the sum by the amout of #'s in the problem.
Suppose the random variable, X, that you are studying, has a mean = m, and standard deviation (sd) = s. Then z = 1.33 is equivalent to saying that(x - m)/s = 1.33 or that your observed value is greater than the mean by 1.33 times the sd.
If the selling price is S and the Mark-up is M% then the cost, C*(1 + M/100) = S So that C = S/(1+M/100) = 100*S/(100 + M)