Find the coordinates of the center and the measure of the radius for a circle whose equation is (x-8)2 + (y+4)2 = 12

Given abcd ac=38 and ae=3x+4 find the value of x

Astuntman jumping off a 20-m-high building is modeled by the equation h=20-5t^2, where t is the same in seconds. a high-speed camera is ready to film him between 15m and 10m above the ground. for which interval of time should the camera film him?

Another type of subtraction equation is 16-b=7. explain how you would sole this equation then solve it.