Pre-Calculus

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I am taking College Algebra...

I am taking College Algebra and tomorrow we are supposed to have a quiz on the first chapter and there are a couple of types of problems I am having trouble to understand how to solve them like the Average Rate of Change and this type of problem to evaluate f(x+h) when given f(x) can you help me understand how to solve these types of problems I don't have to do Difference of Quotient on the quiz

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