Please help me with this and explain. It’s due in a bit :/

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.

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

What is the slope of the line shown below?