If f(x)=-x-7, find f(-5)?

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Answer 1 · 2018-05-09T22:30:30

#f(-5) = -2#

To find #f(-5)#, you start with the function, #f(x)#:

#f(x) = -x-7#

Substitute #-5# everywhere that you see an x:

#f(-5) = --5-7#

minus a minus is a plus:

#f(-5) = 5-7#

Simplify:

#f(-5) = -2#