Simplify:
Help please!!

Adepartment store purchases screen-printed t-shirts at a cost of $5 per shirt. they mark up the price 150% (making the selling price 250% of the store's purchase price) and put them on the sales floor. every month that a t-shirt doesn't sell, the store reduces the selling price by 25%.

If i have one apple and give you the apple, how many apples do i have?

Write the point-slope form of the line passing through (2, -12) and parallel to y=3x.