Elsa knows that for every bushel of apples she sells she earns $9 and for every basket of pears she earns $11. she uses the expression 9a + 11p to keep track of her earnings.

part a: identify the coefficients and variables in the expression.
part b: how many terms are in the expression, what are they, and how do you know?
part c: which term in the expression shows the total earned from selling baskets of pears? (