Which represents the solution set of the inequality 5x-9<21 A) x<12/5 B) x>12/5 C) x>6 D) x<6

The graph shows the distance y, in inches, a pendulum moves to the right (positive displacement) and to the left (negative displacement), for a given number of seconds x. how many seconds are required for the pendulum to move from its resting position and return? enter your answer in the box.

What is the base of 1/9 to the power of 2

What percent of 18 is 24? and plz explain thx.