i appreciate any and all help. im gettin further and further into this and im gettin more and more lost...im not very good at writing notation on the computer, but i tried my best...i think most is pretty self explanatory

5.f is defined as

- sin x if x is greater or equal to c

- ax + b if x is less than c

where a b and c are constants. if b and c are given, find all values of a (if they exist) for which x is continuous at point x=c

domains of f and g consists of all real numbers. let h(x)=f[g(x)] whenever g(x) lies in the domain of h and give one or more formula for determining h(x)

6. f(x)=x^2 -2x

g(x)=x+1

thanks in advanse for any help, answers, or explanations