Amy wants to buy a new and bigger bike. she visits the same store where she purchased her old bike. the manager says the new and bigger bike costs 25 dollars less than three times the cost of her old bike. if she spent 65 dollars on her old bike, how much does the new and bigger bike cost? a: 90 dollars b: 170 dollars c: 195 dollars d: 220 dollars

Which statement explains how you could use coordinate geometry to prove the opposite sides of a quadrilateral are congruent? a. use the slope formula to prove the slopes of the opposite sides are the same. b. use the slope formula to prove the slopes of the opposite sides are opposite reciprocals. c. use the distance formula to prove the lengths of the opposite sides are the same. d. use the distance formula to prove the midpoints of the opposite sides are the same.