From a group of 12 students, we want to select a random sample of 4 students to serve on a university committee. how many combination of random samples of 4 students can be selected?

State if the two triangles are congruent. if they are, state how you know?

To solve the system of equations below, pedro isolated the variable y in the first equation and then substituted it into the second equation. what was the resulting equation? { 5y=10x {x^2+y^2=36

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 !