While Sarah was driving into the one-way tunnel to Domainville, she saw that the tunnel had a shape that could be modelled by the quadratic equation ℎ(��) = −12��2 − 2�� + 16 ,
where ℎ is the height (in metres) of the tunnel and �� is the horizontal distance (in metres).
a) How wide is the tunnel at the road surface?

f

step-by-step explanation:

f

hello from mrbilldoesmath!

answer:

x - 3

discussion:

x^2 - 9 = (x-3) (x+3)   so

(x^2-9)/ (x + 3) = x-3

you,

mrb

1/8 3/16 3/4

step-by-step explanation:

you put them as all the same denominator and multiply

-8/2y-8=5/y+4-7y+8/y^2-16

we move all terms to the left:

-8/2y-8-(5/y+4-7y+8/y^2-16)=0

we can not solve this equation