You earn scores of 85% and 91% on two history tests. Write an equation or inequality to find the score you
can earn on your next history test to have an average
of greater than 90%.

X+y=-4 x-y=2 use elimination with adding and subtraction

Determine which postulate or theorem can be used to prove that lmn =nmo

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 −