Which step is not necessary when solving this system of equations by graphing?
(3x-y-4
(x+y--4
o identify the point of intersection.
o choose a method to graph the equations.
o determine the shaded area for each line.
o write the solution as an ordered pair

3. mr. sanchez’s class sold fruit pies for $1.65 each and mr. kelly’s class sold bottles of fruit juice for $1.36 each. together, the classes sold 79 items and earned $118.17 for their school. (a) write and solve a system of equations that model the problem. show all your work. (b) which class earned more money? (c) how much more money did that class earn?