The tires mary wants to buy for her car cost $200 per tire. a store is offering the following deal.

buy a tire and get the 4th tire for 75% off!

mary will buy 4 tires using the deal. a sales tax of 8% will be charged after applying the discount. how much money will mary saveby using the deal instead of paying the full price for all 4 tires?

b.an increase in a causes b to decrease

(x+3)(x+7)

step-by-step explanation:

option c) graph of line going through 1, 4 and 3, 10

step-by-step explanation:

let y equal to margo's coin collection

let x equal to number of years

at the begining x=0, y=1 → point=(x,y)→point=(0,1)

she adds 3 coins per year, then y=1+3x

at x=1, y=1+3(1)=1+3→y=4→point=(x,y)→point=(1,4)

at x=3, y=1+3(3)=1+9→y=10→point=(x,y)→point=(3,10)

the graph of line going through (1, 4) and (3, 10), then the option c is the correct.