I'm currently in the 4th grade and working on one of my assignments. i'm not too sure how to solve this problem: "john bought 9 cds. some of then cost $12.75, and the rest cost $11.95. the total was 112.35. how many did he buy at each price? " i'd really appreciate it if someone were to me solve this, and explain how you got the answer.

Solve the following simultaneous equation by using an algebraic method (either substitution or elimination) 2x + 3y=-4 4x-y=11

Find each value of the five-number summary for this set of data. [note: type your answers as numbers. do not round.] 150, 120, 136, 180, 158, 175, 124, 162 minimum maximum median upper quartile lower quartile

Me with this assignment ! i only partially understand, so explain. also it's a work sample. at the championship bike race, steve and paula were fighting for first place. steve was 175 feet ahead of paula and had only 300 feet left to go. he was very tired and was going only 9 feet per second. paula was desperate to catch up and was going 15 feet per second. who won the bike race and by how far did she/he win?