Y=ax^2 +bx+c
y=a(x+3)(x+9)(x+20)

Are these quartic or quadratic and why?

The degree of a polynom is given by the highest power of x.

For second degree (quadratic) we have x²: so ax²+bx+c is quadratic

For quartic: we would have x⁴. None of them quartic.

For y=a(x+3)(x+9)(x+20), by expanding we get an x³. So this is cubic, or of third degree.

answer: yard ramps with a level off platform are typically 36 feet long. truck, rather than at an angle, enabling access to those pallets at the very back of the truck. if you are using your yard ramp to convert a loading dock into a drive-in door, we even at 60 inches (5 feet) high and a 30 foot ramp, the slope of the ramp will be less

step-by-step explanation:

4+4+2x

or

2x+8

step-by-step explanation: