Alibrary has 9,000 books. during renovations, the library wants to pack them into boxes that hold 10 books each. how many boxes are needed?

Lisa has three classes that each last 50 minutes. what is the total number of minutes of the three classes

Lance lived in portugal and brazil for a total of 14 months to learn portuguese. he learned an average of 130 new words per month when he lived in portugal, and an average of 150 new words per month when he lived in brazil. in total he learned 1920 new words. write a system of equations to represent the situation. use x to represent portugal, and y to represent brazil

Add the two expressions 4.6 x -3 + -5.3 x + 9