In 2014, County X had 783 miles of paved roads. Starting in 2015, the county had been building 8 miles of new paved roads each year. At this rate in n is the number of years after 2014, which of the following functions f gives the number of miles of paved road there will be in County X (Assume that no paved roads go out of service) multiple choice answers in picture

its 8

step-by-step explanation:

ab will be equal to

is only a line? i think so

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