(01.02 mc) each week, abigail earns $75 for every shift she works at the pizzeria and $25 for every dog-walking job. she uses the expression 75x + 25y to keep track of her earnings. part a: identify the coefficients and variables in the expression. (3 points) part b: how many terms are in the expression, what are they, and how do you know? (4 points) part c: which term in the expression shows the total earned from the pizzeria? (3 points)