Explain to me i don't understand why x -2 less than/ equal to 0 but x + 4< don't understand why the inequalities sign both are different

What is the square root of 45? (step by step working plz)

What is the measure of angle z in this figure? enter your answer in the box. z = ° two intersection lines. all four angles formed by the intersecting lines are labeled. clockwise, the angles are labeled 43 degrees, x degrees, y degrees, and z degrees.

What expression is equivalent to 42x-56y