Which step is not necessary when solving this system of equations by graphing? 3x-y=4 x+y= -4

()1. how do you find range? 2.the following set of data is to be organized into a histogram. if there are to be five intervals on the graph, what should the length of each interval be? 30, 34, 23, 21, 27, 25, 29, 29, 25, 23, 32, 31

Solve this equation using substitution. {4x + y = −2} {4x + 6y = 44}

Does anyone know how to do geometryme with this problem