If Evan does a job in 168 hours and with the help of Emma they can do it together in 56 hours, how long would it take Emma to do it alone?

Which statements about the system are true? check all that apply. y =1/3 x – 4 3y – x = –7 the system has one solution. the system consists of parallel lines. both lines have the same slope. both lines have the same y–intercept. the equations represent the same line. the lines intersect.