Please help asap i dont know how to solve this

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%.

Josephine has a great garden with and area of 2x2 + x - 6 square feet

Tom travels between the two mile markers shown and then finds his average speed in miles per hour. select the three equations that represent this situation.