Question

Date: t rates to determine the better buy? b. Stop and Shop: 6 packages of Oreos cost $15.00 Key Food: 5 packages of Oreos cost $13.25

Answer 1

To determine the better buy you have to calculate how much one package costs in each shop.

1) 6 packages cost $15.00

If you use cross multiplication you can determine how much 1 package costs:

6 packs ______$15.00

1 pack _______$x

`\begin{gathered} (15.00)/(6)=(x)/(1) \\ x=(15)/(6)=(5)/(2)=2.5 \end{gathered}`

Each package costs $2.5

2) 5 packages cost $13.25

5packs_____$13.25

1 pack______$x

`\begin{gathered} (13.25)/(5)=(x)/(1) \\ x=(13.25)/(5)=2.65 \end{gathered}`

Each package costs $2.65

For the second purchase each package cost $0.15 more than in the first purchase.

Is best to buy the 6 packages at $15.00