Help with this math please

Chemistry balance then what type of reaction are they i don't know why it keeps saying math when i put chem

Two lines parallel to a third line are parallel to each other. always sometimes or never

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