I'm doing homework and need help. The problem has come to " x-3x " would it be 2x? or something else? pls help <3 thank you. ​

What will the graph look like for a system of equations that has no solution? a. the lines will be perpendicular. b. the lines will cross at one point. c. both equations will form the same line. d. the lines will be parallel.

    choose the correct definition for  extremo.  a.  end      b.  extra      c.  extract      d.  eventual 

Acircle has a circumference of 7.850 units. what is its radius?