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Question

At a fast food restaurant, a milk shake costs $r$. A chicken sandwich costs 3 times as much as the shake. A large order of French fries costs $\$3$. If $r-2$, how much do 3 chicken sandwiches and 2 large orders of French fries cost?

The answer I get is $\$24$ but the answer book says $\$22$ and I cannot figure out how it is $\$22$?

Thanks.

Answer 1

At a fast food restaurant, a milk shake costs r . A chicken sandwich costs 3 times as much as the shake. A large order of French fries costs \$3 . If r=2 , how much do 3 chicken sandwiches and 2 large orders of French fries cost?

We have $3(3r)+ 2(3) = 9r+6$

If $r=2$ this is $9r+6 = 24$, as you stated.

The answer I get is \$24 but the answer book says \$22 and I cannot figure out how it is \$22 ?

The reason is a typographical error in the textbook.