Petra wants to buy a skateboard. the skateboard deck usually costs $37.50, but it is on sale for 20% off.

part a. if the sales tax is 5.2% how much will petra pay for the skateboard deck in all? (i have this answer which is $12.3)

part b. if the selling price of $37.50 represents a 20% markup, will the store still make a profit after the 20% markdown? explain.

No

Step-by-step explanation:

because the 20% mark up is there profit and there is a 20% discount witch is takes the same amount off the price they would get.

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.