Which of these statements are correct about two parallel lines in a coordinate plane? Select three that apply.

An arc subtends a central angle measuring 7pi/4 radians what fraction of the circumference is this arc?

Evaluate the discriminant of each equation. tell how many solutions each equation has and whether the solutions are real or imaginary. 4x^2 + 20x + 25 = 0

The sum of the squares of two numbers is 8 . the product of the two numbers is 4. find the numbers.