Astore purchased a dvd for $12 and sold it to a costumer for 50% more than the purchase price. the customer was charged a 7% sales tax when the dvd was sold. what was the customer's total cost for the dvd

The Customer's total cost for DVD was $19.26

Step-by-step explanation:

Given:

Purchase price of DVD = $12

Sold amount = 50% more than purchase amount.

So we will first calculate the amount at which the DVD was sold.

Selling Price of DVD =

Sales tax imposed = 7%

So we will find the amount charged in Sales tax.

The amount charged in Sales tax can be calculated by multiplying sales tax percent with Selling Price of DVD and then dividing by 100.

framing in equation form we get;

The amount charged in Sales tax =

Now we need to find the Total cost for DVD.

Total cost for DVD is equal to sum of the amount at which the DVD was sold and the amount charged in sales tax.

framing in equation form we get;

Total cost for DVD =

Hence The Customer's total cost for DVD was $19.26

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.