If a train traveled 34 miles in 20 minutes. How many miles per hour was it traveling

102 mph

Step-by-step explanation:

1 hour = 60 minutes

(34 miles / 20 minutes) x 3 = (102 miles /60 minutes)

Therefore, the train travels at 102 miles per hour

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