1. WXYZ is a parallelogram. XZ is a diagonal for WZ and XY. 2. ∠WXZ and ∠YZX are alternate interior angles. ∠WZX and ∠YXZ are alternate interior angles.

3. ∠WXZ≅∠YZX and ∠WZX≅∠YXZ

4. XZ ≅XZ

5. △XYZ≅△XWZ

6. WZ ≅XY and XW ≅YZ

f

step-by-step explanation:

f

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).