Railroad tunnel is shaped like a parabola: the height of the tunnel at the center is 54 ft and the vertical clearance must be 18 ft at a point 8 ft from the center.
find an equation for the parabola

5x+40

5(x + 8)

7x - 49

7(x - 7)

18x + 9

9(2x + 1)

15x - 10

5(3x - 2)

step-by-step explanation:

for number one all you have to do is factor 5 out of 5x + 40

for number 2 factor 7 out of 7x - 49

for number three factor 9 out of 18x + 9

for number four factor 5 out of 15x - 10

0.02040816326