Please help me on this

Lisa has three classes that each last 50 minutes. what is the total number of minutes of the three classes

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

Given that y varies directly to the square root of (x + 1), and that y = 1 when x = 8,(a)express y in terms of .x,(b)find the value of y when x = 3,(c)find the value of x when y = 5.