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

The step which is not necessary is,

Step-by-step explanation:

The step which is not necessary when solving this system of equations by graphing is,

we know that

applying the law of sines

°

so

∠j=18°

∠k=29°

∠l=180-(18+29)=133°

the answer part a) is

the measure of angle k is  ≈29°

part b)  the measure of angle k could also be

(180-29)=151°

so

∠j=18°

∠k=151°

∠l=180-(18+151)=11°

the answer part b) is

the measure of angle k could also be 151°

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i would need to see the dot plot : )