In right ΔDEF, DF = 20, m∠ F = 90˚, EF = 17. Which of the following is true? Select all that apply

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%.

Aquadrilateral has exactly one pair of parallel sides. which name best describes the figure?

Check all that apply. f is a function. f is a one-to-one function. c is a function. c is a one-to-one function.