If a plane travels 900kms in 3 hours what is its rate of speed expressed as a unit rate

Abacteria population is tripling every hour. by what factor does the population change in 1/2 hour? select all that apply

The krasnapolski is a top-of-the-line hotel in amsterdam, the netherlands. among their many services, they rent bicycles to guests. the bicycle checkout is open 24 hours per day 7 days per week and has 50 bicycles on hand. on average, 10 guests request a bicycle each day, arriving completely randomly at all times of the day during the spring and summer seasons. guests keep bicycles for four days on average, with a standard deviation of two days. how long does a guest on average have to wait for a bike? a. approximately 24 hours b. approximately 0.033 hours c. approximately 4 days d. approximately 47 minutes

Use the elimination method to solve the systems of equations.choose the correct ordered pair. 7x+4y=39