Some hot dogs come in packages of 8.why would a baker of hot dog buns packages 7 hot dog buns to a package

In the rectangle below ac=30 units what is de

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.

How do you solving the solution of each system using elimination?