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

Master

Mathematics

21 April, 02:57

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.

+2

Answers (1)

Know the Answer?

Beanie · Answer 1

A) Original price : y = 10. x

Cheaper brand : y = 7x

The original box is $3 more than the cheap one.

Proof:Suppose 1 box is bought of each (x=1), Original will cost $10 & the Cheaper Price is $7

B) Each time he buys a cheap brand he save $3 ($10-$7).

On 5 cheap boxes, He would save $3 x 5 boxes = $15.