What is the answer extra before 12: 00am

Identify an equation in point slope form for the line perpendicular to y=3x+5 that passes through (4,-1)

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

Aswimming pool had 2.5 million liters of water in it. some water evaporated, and then the pool only had 22 million liters of water in it. what percent of the water evaporated?