Which of the following expressions represents a function? O {(1, 2), (4, -2), (8,3), (9, -3)}
O y² = 16 – x²
O 2x² + y² = 5
O x = 7

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

: )

lol.

it's ok we all do this sometimes.

-aparri

d. corresponding side lengths in similar triangles are proportional in length.

step-by-step explanation: