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How do you determine whether a relationship represented as as graph is linear or nonlinear

Find the greatest common factor of the followig monomials 46g^2h and 34g^6h^6

Jessica is organizing a guided tour of the rain forest. the average profit per person that the touring company makes is given by the rational expression 18x+35/x, where x is the number of people going on the tour. what does the numerator of this rational expression represents?