Mona has a bag containing 4 red marbles, 12 greens marbles, and 8 black marbles. Without looking, she pulls out one marble from the bag and does not replace it. She then pulls a second marble from the bag. What is the probability that she will pull a red on the first pick and
red on the 2nd pick?

1 / 46

Step-by-step explanation:

P(R, R) = · = (simplified form)

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