What is the slope of the line through (-9,6) and (-3,9)?

Combine like terms to make a simpler expression 3z+z

The anwser cause i do not understand just plez

Asystem of linear equations contains two equations with the same slope. select all of the correct statements. i a. the system may have two solutions. - b. the system may have infinitely many solutions. c. the system may have one solution. o d. the system may have no solution. submit