The cost is $100. Take $325, and subtract $125. It gives you $200. And you have to divide that in half cuz the price is twice the cost. So the cost is $100
It would be 12 because if you divide 9 by 3/4 also known as .75 (by dividing 3 over 4) you get 9. In the picture is an example of what the dividend divisor and quotient are. Hope this helped! If not, you can ask me