Springfield and futureland are 775 miles apart. stephanie leaves springfield traveling toward futureland at 85 miles per hour. at the same time, justin leaves futureland heading for springfield at 70 miles per hour. how many miles from springfield will they pass each other on the road?

425 miles

Step-by-step explanation:

Their speed of closure is the sum of their speeds: 85 + 70 = 155 miles per hour. Then they cover the 775 mile distance in

... (775 mi)/(155 mi/h) = 5 h

Stephanie has traveled (85 mi/h)·(5 h) = 425 mi from Springfield to their meeting point in that time.

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