Quadrilateral abcd has coordinates a (3,-5) b (5,-2) c (10,-4) d (8,-7) quadrilateral abcd is a ?

It's a parallelogram because opposite sides are congruent and adjacent sides are not perpendicular.

if i put something wrong your not gonna like it so rather not say nothing.

the revenue of the fitness center, y, is the product of two factors: the number of members and the fee paid by each member. there are 320 members now, but number of members goes down by 10 for each $5 increase in fees, so if x is the number of $5 price increases then members is equal to (320 - 10x). since the fee is currently $45, and the fee increases by $5 for every price bump x, the fee is given by (45 + 5x). so, revenue y is given by y = (320 - 10x)(45 + 5x).