Y=0.5 (x+5) (x-2)
What is the value of x and y of the vertex ? (Please please please help)

The lengths of all sides of a triangle are integers when measured in decimeters. one of the sides has length of 1 dm and another of 3 dm. find the perimeter of the triangle.'

What is the 17th term in the arithmetic sequence in which a6 is 101 and a9 is 83

In the diagram, ab is tangent to c, ab = 4 inches, and ad = 2 inches. find the radius of the circle.