A coffee seller makes a salary of $3,500 per month plus a $12 commission for every $100 of coffee he sells. A case of coffee costs $25. Write an equation that you can use to find the number of cases of coffee the salesman needs to sell to get a certain paycheck at the end of the Saturday. Please answer with the equation PLEASE HELP!

What is the volume of this square pyramid?

Mariah is randomly choosing three books to read from the following: 5 mysteries, 7 biographies, and 8 science fiction novels. which of these statements are true? check all that apply. there are 20c3 possible ways to choose three books to read. there are 5c3 possible ways to choose three mysteries to read. there are 15c3 possible ways to choose three books that are not all mysteries. the probability that mariah will choose 3 mysteries can be expressed as . the probability that mariah will not choose all mysteries can be expressed as 1 −

Is experimental probibilty the same as the observed frequency in math? i need the answer asap!