Math help

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

Question

Math help

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

anonymous · Answer

Let g be the number of pounds of granola she purchased.

r + g = 2.1  : It says the total weight is 2.1
Solve for g
g = 2.1 - r

anonymous · Answer

so it would be A