Hello! I am confused with my practice worksheet the equation is -5+25x-40x-10=-4x-8x​

Acircle has a diameter will endpoints of (-2,8) and (6, 4). what is the center of the circle

What is the equation of a vertical line passing through the point (−5, −1)? y = −5 y = −1 x = −5 x = −1

The height of a flare fired from the deck of a ship in distress can be modeled by h(t)= -2(8t^2-52t-28), where h is the height of the flare above water and t is the time in seconds. a. find the time it takes the flare to hit the water.