For the graph x = 78 find the slope of a line that is perpendicular to it and the slope of a line parallel to it. Explain your answer with two or more sentences.

Hi!

The graph "x = 78" represents a vertical line passing through the point (78, 0).

Parallel lines always have the same slope, and for this equation a vertical line has an "undefined" slope.

Perpendicular lines have opposite inverse slopes. A line that's perpendicular to a vertical line is, of course, a horizontal line. Horizontal lines have a slope of 0.

Parallel to the equation: undefined

Perpendicular to the equation: 0

Hope this helps! Let me know if you need any other help! :0)

hello from mrbilldoesmath!

answer:

25x^2 + 90x + 84

discussion:

mn(x) = m(n(x)) = m( 5x + 9) =

(5x + 9)^2 + 3 =>

25x^2 + 90x + 9^2 + 3 =

25x^2 + 90x + 84                 (as 9^2 = 9*9 = 81)

which is the second choice

regards,  

mrb

p.s.   i'll be on vacation from friday, dec 22 to jan 2, 2019. have a great new year!

25/6 hope it : )

step-by-step explanation: