find the y-intercept of the parabola y = x2 + 8x + 9.
simplify your answer and write it as a proper fraction, improper fraction, or integer.
submit

answer: i think it's a

step-by-step explanation:

the answer is b: 18

step-by-step explanation:

use the pythagorean theorem to .

a^2+b^2=c^2

plug 18 for "r"

the 2 legs are 18 and 24

18^2+24^2=c^2

324+576=c^2

900=c^2

c=30

30-12=18

18 is the radius

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