Question

Sam is mailing packages. Each small package costs him $2.70 to send. Each large package costs him $4.30. How much will it cost him to send 4 small packages and 1 large package?

Answer 1

Let `s` = the cost of a small package and
`l` = the cost of a large package

4 small packages and 1 large package
`4s+l`

Substitute `s=$2.70` and `l=$4.30`
`=4($2.70)+($4.30)`
`=$15.10`