Can someone help me please​

What signals you that factoring by grouping is the best method to use when factoring a problem?

Determine which postulate or theorem can be used to prove that lmn =nmo

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.