Two people each deliver food to people's homes. The amounts of money Peter and Maria each charge to deliver food are
described below.
• Peter charges a flat fee of $3.75 for each delivery plus $0.10 per mile for each
mile he drives.
• Maria charges a flat fee of $2.25 for each delivery plus $0.25 per mile for each
mile she drives.
Write an equation that represents Peter's charges to deliver food as
f(x)
and write
and equation that represents Maria's charge to deliver food as 9(x)..