7 freshman, 6 sophomore, 6 juniors, and 6 seniors are eligible. In how many ways can 12 students be chosen if it is to consist of exactly 2 juniors and exactly 3 seniors, the rest must be freshman or sophomores?

*face palms*

step-by-step explanation:

no

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18

answer: idk wbu

step-by-step explanation: