Answer:
We need to right the proper algebraic expression to each case.
(a) Number x greater than y

(b) The product of 2a and b is

(c) You want to by x chocolates for $2 and y chocolates for $3, how much would you pay for the purchase?

(d) Mr. Jan has x chickens and y cows, how many legs there are in total?
Each chicken has two legs, and each cow has four legs, so the expression of the total number of legs is

Where
represents chickens and
represents cows.