Please help school starts in a couple hours

C and D

Step-by-step explanation:

C. 1/2 x k is equal to k/2 because if we input a number for k, we get the same output in both of them.

1/2 x 1 = 1/2

0.5 = 0.5

D. k ÷ 2 is the same as k/2 because a denominator of the fraction functions as the divider.

1 ÷ 2 = 1/2

0.5 = 0.5

answer is 144

step-by-step explanation:

a)(x-2)^2+(y-1)^2=9

step-by-step explanation:

(picture explains)