Sherri is going to her friends house for dinner. she walks there (1.5 miles) at 3 mph, has dinner for 2 hours, and rides her friends bike home at 8 mph. how long was she away from home? explain work

1.5 miles at 3mph would take 30 minutes plus 2 hours at dinner then 11 minutes 15 seconds to get home .

2 hours 41 minutes 15 seconds

Formula: Distance = Rate x Time

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).