When solving a system by substitution, one should
a. look for coefficients that are reciprocals
b. solve for x or y in one equation first
c. look for coefficients that are the same or opposites
d. always multiply by -1

If a baby uses 15 diapers in 2 days how many diapers will the baby use in a year

25 ! the line of best fit is h = 5a + 86. predict the height at age 16. show your work.

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