In the figure, m and n are midpoints of rt and st. what is the length of mn? a. a + b b. b - a c. 2 i think it's b. what do you think?

What can you determine about the solutions of this system

Click an item in the list or group of pictures at the bottom of the problem and, holding the button down, drag it into the correct position in the answer box. release your mouse button when the item is place. if you change your mind, drag the item to the trashcan. click the trashcan to clear all your answers. solve this quadratic equation using the quadratic formula. 2x2 - 2x=1 need asap

Someone me i need with this stuff