Solve the system of equations. \begin{aligned} &-9y+4x - 20=0 &-7y+16x-80=0 \end{aligned}


−9y+4x−20=0
−7y+16x−80=0


x=x=x, equals
y=y=y, equals

step-by-step explanation:

if u want da anser kill your teeser ifu hav wun

step-by-step explanation:

hans did not square the 40-unit side; he merely multiplied it by 2.   incorrect.

second option

step-by-step explanation:

the measures of a triangle equal 180. use that to find x.

2x+3x+4x=180

9x=180

9x/9=180/9

x=20

now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.

because angle a is 40°, the first option doesn't work.

because angle b is 60°, the second option does work.

when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.

when you add angle a and c, you get 120°, which is not 100.

answer: idk wbu

step-by-step explanation: umm..