If 2x + 3y > 6 and y-x > -1 ,the sign of which of the following expressions can be uniquely determined?
A. 3x + 7y
B. 4x + 11y
C. x+y
1.Only A and B
2.Ony B and C
3.Only C and A
4.A,B and C
5.None of these
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Inequalities
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winnerhere
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Now add 2x+3y>6winnerhere wrote:If 2x + 3y > 6 and y-x > -1 ,the sign of which of the following expressions can be uniquely determined?
A. 3x + 7y
B. 4x + 11y
C. x+y
1.Only A and B
2.Ony B and C
3.Only C and A
4.A,B and C
5.None of these
2y-2x> -2
We get 5y > 4
y> 4/5
Put this in first equation
2x > 6 - (3*(4/5))
x > 9/5
Using these values for x and y, we can determine signs for all the above equations.
