What is the standard fom of the equation of a circle whose diameter is 8 units and whose center is (2, -4)

Trish receives $450 on the first of each month. josh receives $450 on the last day of each month. both trish and josh will receive payments for next four years. at a discount rate of 9.5 percent, what is the difference in the present value of these two sets of payments?

Which equation results from adding the equations in this system? x+6y=9 and -x+2y=-15

The median am of triangle ∆abc is half the length of the side towards which it is drawn, bc . prove that triangle ∆abc is a right triangle, and find angle mac and abm