If x=-4 and i am trying to put it i to this equation y=-x-4 how would i do that

The measurement of one angle of a right triangle is 42° what is the measurement of the third angle? (there is no picture)

The computer that controls a bank's automatic teller machine crashes a mean of 0.6 times per day. what is the probability that, in any seven-day week, the computer will crash less than 5 times? round your answer to four decimal places

The graph represents f(x)=[x]+3. what is f(-2.2)?