A subtract the 15 and then divide by -5

B add 15 and then divide by -5

C subtract 5y and then divide by 15

D add 5y and then divide by 15

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 −

Determine the height of each triangle. round to the nearest foot. a. 7 ft c. 8 ft b. 5 ft d. 4ft

How do i answer this i do not get this at