Janie wants to make raisin cookies. she needs 8 1/2 cups of raisins for the cookies. a 15-ounce box of raisins contains 2 3/4 cups. how many boxes must janie buy to make her cookies?

  21.3

step-by-step explanation:

multiplying the given equation by c/sin(25°), we get

  c = 9/sin(25°) ≈ 21.2958 ≈ 21.3

we assume "c" is the length of ab, the side opposite angle c in triangle abc.

225x²+4=0

225x²=0-4

225x²=-4

x²=-4/225

x=±√-4/225