The closed circle means the inequality is greater than or equal to (≥) or less than or equal to (≤) An open circle means the inequality is greater than (>) or less than (<)
Since the arrow is pointing to the left towards increasingly lesser numbers, any “x” value will be at the beginning number of 2 or some value less than 2. Answer: x≤2
4. If , then . So we're told that but this is impossible, because that would that for any , we have -5 = -2. This is false, so this system has no solution.
7. "y is 6 less than 3 times x" means . "x is 2 more than one-third of y" means . Solving the second equation for gives , which would mean . But for the same reason as in (4), there is no solution. For any value of , this equation gives the false conclusion that -6 = -2.