What is the "difference quotient" and is there a specific formula for

F(x) = 1/x g(x)=x-4 can you evaluate (g*f)(0) ? why or why not?

Afarmer has a large field that is x feet in length. he wants to fence in a rectangular section in the middle of the field , leaving a length of 100 feet of open field behind each end of the fenced rectangle.he also wants the width of the fenced-in space to be 100 feet less than its length. find the expressions to represent the length and width of the fenced section of the field

Benjamin is making bow ties. how many 1/2yards lomg bow ties can he make if he has 18 feet of fabric?