45 - point question! me on the attached file and explain answer ! : d

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

In a two-digit number the units' digit is 7 more than the tens' digit. the number with digits reversed is three times as large as the sum of the original number and the two digits. find the number.

Sawsan recorded the favorite sport of students at her school. she surveyed 200 students. how many students chose tennis?