)how many ways are there to divide a group of 10 kids into two groups of 5 to play soccer?

Twenty-five percent of the customers entering a grocery store between 5 p.m. and 7 p.m. use an express checkout. consider five randomly selected customers, and let x denote the number among the five who use the express checkout.

What are “like terms”? why can we only add like terms?

If the discriminant if a quadratic equation is 4 which statement describes the roots?