Roy is hiking down a mountain at a rate of 3 miles per hour. He started at the top
of the mountain on a 12.5-mile trail to
his tent camp. Which is the dependent
variable in this problem situation?
a. time
b. distance
c. altitude
d. speed

if the eqn of the parabola is f(x) = (x-4)(x+2), we need to mult. this out to find the coordinates of the vertex.

then f(x) = x^2 + 2x - 4x - 8, and f(x) = x^2 - 2x - 8.

one way in which you can find the vertex is to calculate x = -b / (2a).   here, that comes to

        )

x = = 1.   f(1) = 1^2 - 2(1) - 8 = - 9.   vertex is at (1, -9).

        2(1) 

find another point on the curve:   let x=0, for which y=-8.   then (0, -8) is on the curve.   plot the vertex and this point and draw a smooth parabola thru both.

hope this

hi! i think the answer is 1/2 : )

step-by-step explanation:

tangent z: 4/3

cosine y: 4/5

cotangent y: 4/3