2x-4y=6 and 3x+y=-5 what is the point of intersection
2 answers:
Answer:
(x, y) = (-1, -2)
Step-by-step explanation:
I like a graphing calculator for solving systems of equations. It shows the point of intersection is (-1, -2).
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You can add 4 times the second equation to the first:
(2x -4y) +4(3x +y) = (6) +4(-5)
14x = -14 . . . . simplify
x = -1 . . . . . . . divide by 14
Now, you can put this value in the second equation to get ...
3(-1) +y = -5
y = -2 . . . . . . . add 3
The point of intersection is (x, y) = (-1, -2).
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Answer: Option 'd' is correct.
Step-by-step explanation:
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Margin of error = 0.5 years
Standard deviation = 5
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Hence, Option 'd' is correct.