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Mathematics 7 Online
OpenStudy (anonymous):

What is the value of f(x) = 9x when x = -2?

OpenStudy (akashdeepdeb):

WELCOME TO OPENSTUDY!! :D

OpenStudy (akashdeepdeb):

f(x) = 9x [This is a function, something that can be put on a graph and has unique value] Now they are asking for f(x) when x=-2 So just substitute -2 in x f(x) = 9x f(-2x) = 9(-2) = -18 Understood how to do THESE type of questions? :)

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