1.) mr harrison bought 42 kilograms of salt for his science classes. each group needs 0.75 kilograms of salt for their experiment. how many groups does mr harrison have in this science class
2.) roman and ranjan each divided 3.56 by 0.72. roman got 4.94 for his quotient. ranjan got 0.04 for his quotient. which student divided correctly? how do you know?
math < 3 (for my little sister since she isn't allowed to create a ; d)

If the graphs of the linear equations in a system are parallel, what does that mean about the possible solution(s) of the system? a. there are infinitely many solutions. b. there is no solution. c. there is exactly one solution. d. the lines in a system cannot be parallel.

The triangles are similar. what is the value of x? 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