Help help. its asking to select all that apply for which ones are written in standard form

What is the effect on the graph of the function f(x)=x when f(x) is replaced with -f(x)+4

X/y + 4y/x divided by x/y - 2y/x explain as in depth as you can how you simplfied the fractions. i don't know where to start on this : /

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