9. you go to a local mechanic to get your tires changed. there is a 6% sales tax, but you get a 10% discount. a. write a function, t(x) for the total purchase amount after taxes but before discounts and fees. b. write a function, d(x) to account for the total after discounts on purchase amount x. c. does it matter whether the mechanic adds the tax first or takes the discount first? show all your work to verify.

Question 2 (essay worth 10 points) (03.02 mc) in δabc shown below, point a is at (0, 0), point b is at (x2, 0), point c is at (x1, y1), point d is at x sub 1 over 2, y sub 1 over 2, and point e is at the quantity of x sub 1 plus x sub 2 over 2, y sub 1 over 2: triangle abc is shown. point d lies on segment ac and point e lies on segment bc. a segment is drawn between points d and e. point a is at the origin. prove that segment de is parallel to segment ab.