What could be the length of the side that corresponds with \overline{AD} AD start overline, A, D, end overline on the scaled copy of the quadrilateral? Choose 3 answers: Choose 3 answers: (Choice A) A 444 units (Choice B) B 6.56.56, point, 5 units (Choice C) C 121212 units (Choice D) D 323232 units (Choice E) E 646464 units Stuck?

answer: d. $20

step-by-step explanation:

just took the test

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

so, converting firstly the mixed fractions to improper fractions and then "adding".