Consider the expression below. z+20 which situations does the expression model? answer choices kenny bought a t-shirt and a pair of jeans. the t-shirt was $20 less than the price of the jeans. if the jeans cost z dollars, how much did the t-shirt cost? doris collected z items for the local food drive. ed collected 20 more items than doris. how many items did ed collect for the food drive? greg and tom played a round of golf. greg's score was 20 points higher than tom's score. if tom score was z points, what was greg's score? the post office sells stamps by the sheet, and each sheet has 20 stamps. if kathy purchased z sheets of stamps, how many stamps did she get?