Answer:
graphing : Find the intersection points
substitution method : If you have e.g. x+2y=9 and x=3+2y, we can substitute it, (3+2y)+2y=9
elimination method : Make two variables the same, minus them and solve the equation
Step-by-step explanation:
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Answer:</h2>
We will simply solve them and get correct answers that will match the answers provided.
1.
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2. 
= 
3. 
= 
4. 
= 
Y=-1/3-2 because you have to make the slope into a negative inverse and the y-intercept stays the same because it's perpendicular.
Normal:3
Negative inverse: -1/3
12•11•h=2,244 would be right :)