Todd and Marshall got in trouble at football practice and have to run laps as a consequence. Todd, who runs at a rate of 1 lap per minute, had completed 10 laps already when he was
joined on the track by Marshall. Marshall's pace is 2 laps per minute. At some point, the two
will have run the same distance. How long will that take?
Write a system of equations, graph them, and type the solution.

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

sounds & other waves originate from any vibrating object

i agree because i see the other persons thinking is clear

answer: they are supplementary angles

step-by-step explanation: 161+19=180. supplementary angles equal 180 degrees