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?

Question

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?

anonymous · Answer

let q represent the pounds of granola purchased.

so r + q = 2.1

also we know the total cost of the purchase.

let r also represent the cost of the raisins purchased.  let q represent the cost of granola purchased. 

3.5r + 5.90q = 8.79

solve the linear system?