What Is 1 x 2 x 3 x 4 x 5/2

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%.

How do you find the circumfrance of a circle?

3x + 4y = 5 x- 3y = -7 solve by substitution