3900 people attended a football game. If 25% of the people who attended were teenagers, how many teenagers attended the game?

What is the value of the digit 1 in the number 13?

Which expression shows the sum of the polynomials with like terms grouped together

Candy lives in the center of town. her friend darlene lives 28 miles to the east and her friend dana lives 21 miles north. approximately how far do dana and darline live apart ?