Question

You make party favors for an event. You tie 9 inches of ribbon around each party favor. Write an expression for the number of inches of ribbon needed for n party favors.

9n
The ribbon costs $3 for each yard. Write an expression for the total cost (in dollars) of the ribbon.
?
(I'm confused on the second question)

Answer 1

One yard is equal to 36 inches, so we divide the number of inches by 36:
9 n inches / 36 inches/yard = 9n/36 yards

Next, we multiply the number of yards of ribbon by the cost per yard to find the total cost:

9n/36 yards * $3/yard = $3 * (9n / 36) = $0.75 * n

So, the expression for the total cost of the ribbon is $0.75 * n.