Prove that if no two medians of a triangle are congruent, then the triangle is scalene

Will used 20 colored tiles to make a design in art class. 5/20 of his tiles were red. what is an equivalent fraction for the red tiles?

When you have 25 numbers, and jake picks 3 random numbers and puts them back, what is the chance bob has of picking those 3 numbers when he picks 6 random numbers (without putting them back)? explain.

Alex's monthly take home pay is $2,500. what is the maximum bad debt payment he can maintain without being in credit overload?