The expression 3C2 represents the number of ways of:

a choosing 2 items at a time from a set of 3. c. arranging, in order, 2 items from a set of 3.

b. choosing 3 items at a time from a set of 2. d. arranging, in order, 3 items from a set of 2.

Option a.

Step-by-step explanation:

The given expression is  

C denotes combination and P denotes permutation.

means choosing r items at a time from a set of n.

means arranging r items at a time from a set of n.

The given expression is a combination, where n=3 and r=2. It means the given expression represents the number of ways of choosing 2 items at a time from a set of 3.

Therefore, the correct option is a.

need points to ask question

step-by-step explanation:

b. would be the answer : )

step-by-step explanation:

step 1: add -16x to both sides.

16x−4y+−16x=64+−16x  

−4y=−16x+64

step 2: divide both sides by -4.

−4y /-4 = -16x + 64/-4

answer:   y=4x−16

hope i'm right