in ABC, D is the midpoijy of AB and E is the midpoiny of BC. if AC =3x-15 amd DE = 6, what is the value of x?

7

Step-by-step explanation:

AC=DE

3x-15=6

solve for x

3x=6+15

3x=21

x=21/3

x=7

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).