Ryan has a bag with marbles. he selects a marble, records the color, and then puts the marble back in the bag. in 25 trials, he selects a green marble 10 times. he selects a blue marble the other times. based on his results, which is the best prediction of how many times ryan will select a blue marble in 100 trials?

tangent

step-by-step explanation:

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