Seven x's and three y's cost as much as four z's. One z costs as much as one x plus one y together. How many x's cost as much as one y?

The border line of the linear inequality 4x + 7y < 5 is dotted true or false?

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

Cd is the perpendicular bisector of both xy and st, and cy=20. find xy.