SOLUTION: Hello everyone! I realize it is stated only one problem per submission, however, there are two problems I worked on and worked on and worked on. Each time I thought I had finally s
Question 458020: Hello everyone! I realize it is stated only one problem per submission, however, there are two problems I worked on and worked on and worked on. Each time I thought I had finally solved correctly I still ended up wrong on quiz.
I have a test reviewing these types of problems (and others) and would like to understand how to do them correctly prior to taking the test. Any help would be so appreciated!
PROBLEM #1:
Solve the system of equations by graphing. Check your solution.
2x+y=-8
3x-y=3
PROBLEM #2:
Solve the system of equations by graphing. Check your solution.
y=x+3
x+y= -2/5
Thank you! Found 4 solutions by stanbon, edjones, richwmiller, wilft1:Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website! PROBLEM #1:
Solve the system of equations by graphing. Check your solution.
Solve each for "y" and graph both on the same set of axes.
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2x+y=-8
y = -2x-8
You need 2 points to graph the line:
(0,-8) and (-2,-4) will do
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3x-y=3
y = 3x-3
(0,-3) and (1,0)
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Solution is the point at which the lines intersect:
Solution: (-1,-6)
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Checking:
2x+y = -8
-2-6 = -8
-8=-8
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3x-y = 3
3(-1)-(-6) = 3
-3+6 = 3
3 = 3
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Cheers,
Stan H.
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PROBLEM #2:
Solve the system of equations by graphing. Check your solution.
y=x+3
x+y= -2/5