I need help 1)If 3 is subtracted from seven times a number, the result is 53. Find the number.

2) The numerator of a fraction is 1 less than the denominator. If the numerator is decreased by 2 and the denominator is increased by 3, the fraction becomes 1/4. Find the fraction.

3)The length of a rectangle is twice its breadth. If the perimeter is 72 meter, find the length and breadth of the rectangle.

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