1. Use a counter example to disprove this statement X < 3 implies x^2 < 9
2.prove that n^2 + n + 41 does not take prime values for all positive integers
3. Are any two straight lines that never meet necessarily parallel
well I can't answer the other two but I can answer the last one
if two lines are not parallel they will meet at some point because a line goes at both directions at an infinite scale and sooner or later they will meet the only exception is when your dealing with a ray a line that starts at a point and goes on in one direction at an infinite scale
I hope this was helpful
The first one is UNtrue because, what if x is less than negative three?