If the Math Olympiad Club consists of 18 students, how many different teams of 3 students can be formed for competitions?

Find the least common denominator for thesetvo rational expressions. n^2/n^2+4n+4 -3/n^2+7n+10

The areas of two similar triangles are 72dm2 and 50dm2. the sum of their perimeters is 226dm. what is the perimeter of each of these triangles?

Tatiana reads 40 pages of her book every night for x number of nights. write an expression that shows the number of pages she has read