The product of a number and 8 less than the number is 65. find the number

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.

If cos(2x) = tan^2(y), show that cos(2y) = tan^2(x).

Find the solution(s) to the system of equations. select all that apply y=x^2-1 y=2x-2