Idk the answer to this

If g(x) = x+1/ x-2 and h (x) =4 - x , what is the value of ( g*h) (-3)?

At which value in the domain does f(x) =0?

Consider the input and output values for f(x) = 2x - 3 and g(x) = 2x + 7. what is a reasonable explanation for different rules with different input values producing the same sequence?