Mr. Edwards is 3 times as old as his daughter. The sum of their ages is 80. How old was Mr. Edwards when his daughter was born?

Answer these questions showing your work plz

Evaluate the discriminant of each equation. tell how many solutions each equation has and whether the solutions are real or imaginary. x^2 - 4x - 5 = 0

For the inequality |c| < |d| to be true, which of the following must be true?