Which mixed # is equivalent to the improper fraction ? 23/3 a. 7 1/3 b. 7 2/3 c. 6 5/3 d. 8 1/3

The answer can be B and C actually. The easiest way I was taught to change a mixed number into a improper fraction is multiply the big number by the denominator and then add the numerator and that'll be the numerator to the improper fraction.

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).