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.

78.59 is the mean

step-by-step explanation:

median is the value separating the higher half of a data sample, a population or probablity distribution from the lower half.

step-by-step explanation:

say you have 3,8,7,3,1,9,8 order them from lowest to highest

if orderd it would be 1,3,3,7,8,8,9 now you take away from the lowest and the highest until you end up in the middle.

so you would remove the 1 and 9 leaving you with 5 digits remaining

when you've reached the middle that would be your answer so in this case the answer is 7

if there were two numbers left say 7 and 5 you'd and them together so 12 then divide by 2 witch would equal 6 so the answer would be 6

good luck on that project hoped i you at all