the resultant of a 10-lb force and another ofrce has a magnitude of 12.3 lb at an angle of 23.4 with the 10-lb force. Find the magnitude of the other force and the angle between the two forces

Along wire carrying a 4.2 a current perpendicular to the xy-plane intersects the x-axis at x=−1.7cm. a second, parallel wire carrying a 3.0 a current intersects the x-axis at x=+1.7cm. part a at what point on the x-axis is the magnetic field zero if the two currents are in the same direction? express your answer to two significant figures and include the appropriate units.