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OpenStudy (ccchristian1):
(08.05) Which of the following ordered pairs represents the solution to the system given below? x − 4y = 7 5x + 9y = 6
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OpenStudy (ccchristian1):
@urbanmorgans
OpenStudy (anonymous):
you got choices? you want to do it? you want to get the answer real fast?
OpenStudy (ccchristian1):
(3, −1) (3, 1) (1, −3) (−1, −3)
OpenStudy (anonymous):
here is the quick way http://www.wolframalpha.com/input/?i=x+%E2%88%92+4y+%3D+7+%2C5x+%2B+9y+%3D+6
OpenStudy (anonymous):
the slow way is to rewrite the first equation as \(x=4y+7\) then substitute in to the second and get \[5(4y+7)+9y=6\] and solve that for \(y\)
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