Gerard bought 9 hamburgers and 3 orders of fries for 24.75. chris bought 6 hamburgers and 4 orders of fries for 19.50. each hamburger cost the same amount. each order of fries cost the same amount. wrote a system of equations that can be used to find how much one hamburger and one order of fries cost.

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 −