- Y=|x| is a function or not?

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What is the quotient in simplest form? State any restrictions on the variable.? What is the Domain and range of f(x)= -3 square root of 4x-12? If f(x)=x^2-1 and h(x)=4x+3, then f(h(2))=? Please demonstrate how to solve this problem. Round to four decimal places please. Thank you.? Which is the biggest country in this world?