3. Which relation is a function? {(5,0), (-8, -5), (-8, 5), (-5, -8)}
{(5,0) (-8,-5)}
{(5,0), (0, -8), (5,-5)}
{(5,0), (0, 5), (-5, -5)}

it would open into a square depending on the type of envelope i’m not sure about the second part

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).

20

step-by-step explanation:

assuming you meant there are 24 pounds of apples in each case, if this is not what you meant, correct me so i can you further