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1. For what ordered pair (a,b) are there infinite solutions (x,y) to the system
4x+ay=-8
2x+y=b

2. What is the y-intercept of the line x-2y=5?

3.Find the value of n that satifies \[frac{1}{n+1} + \frac{2}{n+1} + \frac{n}{n+1} = 3. \]

 Jun 12, 2019

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