7th grade math help pls it’s about slope and stuff

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.

[15 points, algebra 2]simplify the complex fraction and find the restrictions.

Acompany made a profit of 75000 over a period of 6 years on an initial investment of 15000 what is the annual roi