sana1010 sana1010

12-07-2016
Mathematics

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What is the value of k in the function ƒ(x) = 112 - kx if ƒ(-3) = 121?

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dalendrk dalendrk

12-07-2016

[tex]f(-3)=121\\\\subtitute\ x=-3\ and\ f(x)=121\ to\ the\ f(x)=112-kx\\\\121=112-(-3)k\\112+3k=121\ \ \ |subreact\ 112\ from\ both\ sides\\3k=9\ \ \ \ |divide\ both\ sides\ by\ 3\\\\\boxed{k=3}[/tex]

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