Javier was asked to evaluate the expression 12y + 3y when y = 1. Javier simplified the expression to 15y before finding the answer. Are the expressions 12y + 3y and 15y
equivalent?
O A. No, because both expressions equal 15 when y = 1.
B. Yes, because both expressions equal 15 when y = 1.
O C. No, because both expressions do not equal 15 when y = 1.
OD. Yes, because both expressions do not equal 15 when y = 1.
А
B
с
D

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 −