D(5,7), e(4,3), and f(8,2) form the vertices of a triangle. what is m a-30 b-45 c-60 d-90

the answer is b.

step-by-step explanation:

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c.

step-by-step explanation:

substitution for (0,1)

y=x^2+4x+1

1=0^2+4(x)0+1

1=0+4(x)0+1

1=4(x)0+1

1=0+1

1=1

substitution for (-3,-2)

y=x+1

-2=-3+1

-2=-2