Equation a: 3x + y = 6 equation b: 6x - 2y = 4 equation c: y = 3x - 2 equation d: y =  13x + 7   which two lines are perpendicular?

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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!

$6.42

step-by-step explanation: