Please helppp! I will give brainlist...​

Find and simplify an expression for the area of five rows of x squares with side lengths of x centimeters .

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.

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base