Evaluate the function f(x)=7x+3 at the given values of the independent variable and simplify a. f(5) b. f(x+8) c. f(-x) HELP

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asked Jun 20, 2015 6.2k views

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Evaluate the function f(x)=7x+3 at the given values of the independent variable and simplify

a. f(5) b. f(x+8) c. f(-x)

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Mathematics
high-school

Keshawna asked

by Keshawna

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$f(x)=7x+3\\\\f(5)\ substitute\ 5\to x\\\\f(5)=7\cdot5+3=35+3=38\\\\\\f(x+8)\ substitute\ x+8\to x\\\\f(x+8)=7(x+8)+3=7x+56+3=7x+59\\\\\\f(-x)\ substitute\ -x\to x\\\\f(-x)=7\cdot(-x)+3=-7x+3$

Kgibbon answered Jun 25, 2015

by Kgibbon

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