Which of the following are accepted without proof in a logical system? Check all that apply.
A. Postulates
B. Theorems
C. Common Notions
D. Axioms

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

Write the standard form of an equation with (see picture below)

Given δjkl : δxyz, find x. a)10 b)12 c)16 d)20