Valero had 3 pages of stickers. each page had 30 stickers. she gave one sticker to each of the 18 students in her class. how many stickers does she have left?

Seymour is twice as old as cassandra. if 16 is added to cassandra’s age and 16 is subtracted from seymour’s age, their ages become equal. what are their present ages? show !

For the following equations, find the ratio of a to b. be sure to show all of your work. a. 3a = 6b b. 15a = 5b

Which concept can be used to prove that the diagonals of a parallelogram bisect each other?