HELP ASAP SOMEONE ABLE TO HELP??!?!?

(x+c)(x-d)

Step-by-step explanation:

if x²-ax-b=(x-c)(x+d)

from vieta theorem

c + d =  -(-a)=a

cd = b

if x²+ax-b

from vieta theorem

c + d =  -(a)=-a  

cd = b

so the same c d but in opposite  sign (x+c)(x-d)

y = 3x+4

step-by-step explanation:

to find the slope

slope = (y2-y1)/ (x2-x1)

    = (-8-4)/ (-4-0)

    = -12/-4

  = 3

using the slope intercept form of a line

y= mx+b

we know the slope is 3

we know the y intercept is 4 ( the point where it crosses the y axis or x=0)

y = 3x+4

time is equal to distance over rate so

t = d/r

need a little bit more information for the second question.