What do you need to subtract from 77/10 to make 7

Why did the ice arena get so hot after the big game (this is math related google it to find the paper

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.

Janet drove 300 miles in 4.5 hours. write an equation to find the rate at which she was traveling