What does z and x equal

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.

You paid 28.00 for 8 gallons of gasoline. how much would you pay for 15 gallons of gasoline?

Is the figure congruent? yes or no?