Algebra ? !
a group of art students are painting a mural on a wall. the rectangular wall has deminsions of (6x+7) by (8x + 5) and are planning on the mural to be (x+4) by (2x+5). what is the area of the remaining wall after the mural has been painted?
a: 46x^2 + 73x + 15
b: 48x^2 + 86x +35
c: 2x^2 + 13 + 20
d: 50x^2 + 99x + 55

Tom had a total of $220 and he spent $35 on a basketball ticket . what percent of his money did he have left?

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

How can constraints be used to model a real-world situation?