19. If p(x)= 3x2 - 4 and 7(x) = 2x2 - 5x+1 find -5/(2a)

the first one, all those points on the line just make a strait line.

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answer: d.) the total number of protons and neutrons is 15

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i believe that the answer is

b. y-1=-2(x-4)

hope this !

y=3x+4

step-by-step explanation:

given the points a(0,4) and b(-4, -8)

eqn of line ab: (y-4)/(x-0)=(-8-4)/(-4-0)

(y-4)/x=-12/-4=3

y=3x+4