What is the solution set of {x | x < 2} u {x | x ≥ 2}? all numbers less than -2 and greater than 2 the numbers between -2 and 2 the empty set all real numbers asap pls

Read the situations in the table below. then drag a graph and equation to represent each situation. indicate whether each of the relationships is proportional or non-proportional. edit : i got the right answer its attached

How is working backward similar to solving an equation?

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?