Raisins sell for $3.50 per pound, and granola sells for $5.90 per pound. Terri bought some raisins and some granola. The total weight was 2.1 pounds and cost $8.79.

Let r represent the number of pounds of raisins Terri purchased.



Which expression represents the number of pounds of granola she purchased?



A.


2.1 – r


B.


2.1r


C.


r + 2.1


D.


r – 2.1