Help me and please do number 4 and be more specific please Number 5 and 6 also.

The function g(x) is defined as shown. x-1, -2 g(x) = 2x+3, -1 6-x, x23

Which expressions are equivalent to k/2 choose 2 answers: a k-2 b 2/k c 1/2k d k/2 e k+k

Astore has apples on sale for three dollars or 2 pounds how many pounds of apples can you buy for nine dollars if an apple is approximately 5 ounces how many apples can you buy for nine dollars