Thanks for this information, but I see that this hasn't answered what I want to know. It has answered the question, but I still don't understand HOW to do this, and that is what I really wanted to know.

I want to know the actual steps how to get from the equations A≥0.25 (A+B), B≤0.10 (A+B), and A≤0.50 (A+B) by substituting 0 for A, then 0 for B to get the two points on the zero axis that gives me the information to make the plots.

Thanks. Just one more quick point. My instructions are to replace both A then B with 0 and identify points on the axis, which is where I think I got stuck. Replacing B with 0 gives A>= 0.25A, which is confusing me. How can do I get from this step?

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