(From Unit 3 Lesson 9)
9. Noah wants to mail a package to his friend and the cost of mailing it is $5.00. Noah asked his mom for
$5.00 but instead she gave him some postcard stamps that are worth $0.34 each and some first-class
stamps that are worth $0.49 each.
a. Write an equation that relates the number of postcard stamps .p. the number of first-class stamps, f.
and the cost of mailing the package.
