Mariela and Deborah go to the same school. Mariela lives 8 miles east of the school, while one person lives 12 miles south of the school. How far are Mariela's and Deborah's houses approximately? Round your answer to the nearest tenth. I mean

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?

Will mark determine whether the conjecture is true or false. give a counterexample for any false conjecture. given: points r, s, and t conjecture: r, s, and t are coplanar. a) false; the points do not have to be in a straight line. b) true c) false; the points to not have to form right angles. d) false; one point may not be between the other two.

Which graph correctly represents the equation  y=−4x−3? guys me iam not trying to fail summer school and will offer 40 points for who ever me with the next 3 problems and will give brainlest