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Question 955641: 1. I need to graph this equation: 10x+5y=25
2. I need to solve this system graphically and graph it on a graph it- x+y=9 and x-y=5
3.I need to use the substitution method for this problem: -4+y=16
3x+15y=114
I have to type an ordered pair.
4. Use the intercepts to graph the equation- 9x-2y=18
5. I also need to solve this system graphically and graph it: 2x-y=-3 and x+2y=1
Show the graph with the plotted points as well so I can know how to graph it.
These are the problems I need help with.You can send me a document with the answers and show work or you can just e-mail it to me. Thank you all very much.
Answer by EdenWolf(517)   (Show Source):
You can put this solution on YOUR website! Hello! Let's see if I can help.
1) 
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2) When you solve systems using graphs, you graph them and then find where they intersect. So:
The solution is (7,2), or x = 7 and y = 2, because that's where the two lines intersect.
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3)-4+y=16
3x+15y=114
First let's see what y is in the first equation. Basically, solve for y.
y=20
Now plug in 20 into y in the second equation.
3x+15(20)=114
Now solve for x.
3x+300=114
3x=-186
x=-62
So x=-62 and y = 20. The ordered pair is (-62,20).
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4)
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5)
The solution is (-1,1), or x = -1, y = 1, because that's where the two lines intersect.
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I hope I helped!
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