Homework Help: algebra

Posted by Sam on Monday, February 14, 2011 at 6:02pm.

3x + 4 > 9, with x = 2
determine whether or not the solution provided is a solution to the inequality. If the value he or she provides is a solution, provide a value that is not a solution. If the value is not a solution, provide a value that is a solution.

algebra - Shannon, Monday, February 14, 2011 at 6:11pm
3x+4>9
3(2)+4>9
6+4>9
10>9

The value x=2 is a solution to the inequality. A value of x that would not be a solution would be any value lesser than 2, such as 1,0, or -1.
algebra - helper, Monday, February 14, 2011 at 6:15pm
3x + 4 > 9,

Solve the inequality
3x + 4 > 9
3x > 5
x > 5/3 = 1.67

Therefore, for x to be a solution,
x > 1.67

You should be able to finish the problem from here.
algebra - Johnathon, Monday, February 14, 2011 at 6:24pm
If the value is a solution then it will make the statement true when it is substituted in.
3*2+4=10
10 is grater then 9 so 2 is a solution.
To get a number that makes this false we can solve
3x+4=9.
X=5/3

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