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.
PLS HELP

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 cos10 & the cheaper $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