How and what is the value of X?

Find the value of the variable and the length of each secant segment

Determine the number of outcomes in the event. decide whether the event is a simple event or not. upper a computer is used to select randomly a number between 1 and 9 comma inclusive. event upper b is selecting a number greater than 4. event upper b has nothing outcome(s). is the event a simple event? (yes or no) because event upper b has (fewer than, exactly, more than) one outcome.

Write the point-slope form of the line passing through (2, -12) and parallel to y=3x.