Can someone help me with this and can someone tell me what operation it is

Which ahows the graph of the solution set of 6x+4y< 12

Write numerical coefficient of y² in the expression 2x² - 15xy – 7y²

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.