Yani buys a certain brand of cereal that costs $10 per box. Yani changes to a super-saving brand of the same size. The equation shows the price, y, as a function of the number of boxes, x, for the new brand.

y = 7x

Part A: How many more dollars is the price of a box of Yani's original brand of cereal than the price of a box of the super-saving cereal? Show your work.

Part B: How much money does Yani save each month with the change in cereal brand if he buys 5 cereal boxes each month? Show your work.

Question

Yani buys a certain brand of cereal that costs $10 per box. Yani changes to a super-saving brand of the same size. The equation shows the price, y, as a function of the number of boxes, x, for the new brand.

y = 7x

Part A: How many more dollars is the price of a box of Yani's original brand of cereal than the price of a box of the super-saving cereal? Show your work.

Part B: How much money does Yani save each month with the change in cereal brand if he buys 5 cereal boxes each month? Show your work.

adamk · Answer

The new brand costs 7 dollars a box.

adamk · Answer

x is the number of boxes. If you let x = 1 box.. y=7*1 = 7 dollars per box

adamk · Answer

So the savings brand is 7 dollars a box, and the original is 10 dollars per box.

adamk · Answer

If he buys 5 boxes in each month, he saves 5 times (10-7) dollars each month or 15 dollars per month.