What is the median of 15,13,17,19,21

After the seventh month of a 12-month loan: the numerator is: {(n + 11) + (n + 10) + (n + 9) + (n + 8) + (n + 7) + (n + 6) + (n + 5)} = , and the denominator is: {(n) + (n + 1) + + (n + 11)} = . therefore, the fraction is numerator/denominator (to the nearest tenth) = %

Which of the choices shown could be used to prove that aacp=abcp ?

What are the solutions of the system? solve by graphing. y = x^2 + 3x + 2 y = 2x + 2