Answer the question with step by step explanation

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%.

Idon’t understand! use slope intercept form to solve: through: (2,5) slope= undefined

The measure of an angle is 117°. what is the measure of a supplementary angle?