Problema Solution
You make party favors for an event. You tie 9 inches of rib-bon around each party favor. Write an expression for the amount of ribbon you need for n party favors. The ribbon costs $3 for each yard. Write An expression for the total cost of the ribbon.
Answer provided by our tutors
let 'y' represent the length of ribbon needed
the amount of ribbon for n party favors is:
y = 9n in is the expression for amount of ribbon needed
1 yd = 36 in
since 1 yd ribbon costs $3 we can also say that 36 in cost $3 thus 1 in of ribbon costs 3/36 = 1/12 dollars
let 'C' represent the cost of y inches of ribbon:
C = (1/12)*y
C = (1/12)*9n
C = (3/4)n dollars is the expression for the total cost of the ribbon