Given the series 1 + 5 + 9 + + 397, how many terms are in the series?​

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.

Are the corresponding angles congruent? explain why or why not.

I’m still confused on how to work the percentages