In a bag of 100 marbles comprised of many colors, 25 are blue. suppose marbles are selected at random. a. in any set of 5 marbles, how many different ways could you arrange 3 bluemarbles?

The price of a coat increased from $78 to $92. what is the price increase percentage?

Which formula gives the area of a triangle? a=1/2(b+h)

For a read-a-thon, jay and odhràn each started reading a book at the same time and continued reading for several hours. jay's book had 278 pages, and he read 55 pages per hour. odhràn's book had 238 pages, and he read 45 pages per hour. after how many hours did they have the same number of pages left, and how many pages were left?