mark studies a parallelogram and finds the slope and diagonals to be 5/3 and -3/5. what conjecture can be made?

Which system of linear inequalities is graphed? can somebody please

The base of a triangle exceeds the height by 7 centimeters. if the area is 400 square centimeters, find the length of the base and the height of the triangle.

If the ratio of sum of the first m and n terms of an ap is m2 : n2 , show that the ratio of its mth and nth terms is (2m − 1) : (2n − 1).