‼️Please help‼️ I don’t understand

Can someone answer this question? : )

State one method by which you can recognize a perfect square trinomial.

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.