Help pls

28 and 78

98 and 27

26 and 28

1: 25% increase. 2: 25% decrease. 3: 200% increase.

Step-by-step explanation:

For number 1, we see that the difference between 12 and 15 is 3. 3 happens to be 25% of 12, so that is our answer. For number 2, the difference is 6, which is also 25%, except this one is decreasing, so a 25% decrease. For number 3, the difference between 9 and 27 is 18, and 18 is 200% of 9.

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).