Slope = 5, y-intercept = -1

Which problem could be  solved  by evaluating the expression  7×(−3)7×-3?

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

In the figure, triangle aob and triangle boc form a linear pair ,find the measure of x