The main cable of a suspension bridge forms a parabola modeled by the equation y=a(x-h)^2+k Where why is the height in the feet of the cable above the road, X is the horizontal distance in the feet from the right bridge support, aWhere why is the height in the feet of the cable above the road, X is the horizontal distance in the feet from the

x=30

step-by-step explanation:

the barter

step-by-step explanation: i dont

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.