Please help. And thank you

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%.

The border line of the linear inequality 4x + 7y < 5 is dotted true or false?

What is the rate for one gallon of gasoline