What is the equation of the line?

What is the missing reason in step 5? linear pair postulategivendefinition of complementary anglescongruent complements theorem

Find the zeros of each function. f(x) = 6x^2 - 7x - 20

Given the system of equations presented here: 2x + 4y = 14 4x + y = 20 which of the following actions creates an equivalent system such that, when combined with the other equation, one of the variables is eliminated? multiply the second equation by â’4 to get â’16x â’ 4y = â’80 multiply the second equation by â’1 to get â’4x â’ y = â’20 multiply the first equation by 2 to get 4x + 8y = 28 multiply the first equation by â’1 to get â’2x â’ 4y = â’14