1)

Looks like you did this using trial and error. Because this seems to count towards your grade I won't give you exact answers. However, I'll tell you now that given function f(x)...Google is your friends should you need anymore help on this. There are also several good videos on youtube explaining this.

Stretching horizontally by a a factor of c corresponds to f(x/c)

Reflection about the y axis is f(-x)

Reflection about the x axis is -f(x)

Translation up by c is f(x) + c (down is f(x) - c)

Translation b units to the right is f(x-b) (left is f(x+b))

2)

If it's written chances are it means reciprocal. Usually we write inverse functions like so

3)

You'll just need to convert degrees into radians. Use degrees. The same formula applies when you have done the conversion.

Good luck