How do you find #f(-3)# given #f(x)=2x+2#?

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Answer 1 · 2018-03-12T01:32:51

#f(-3)=-4#

Simply substitute the value of #-3# given. In other words, #f(-3)# is the function of #f(x)#, however in this case, #x# is #-3#

#f(-3)=2(-3)+2#

Distribute #2# through the parenthesis

#f(-3)=-6+2#

Simplify

#f(-3)=-4#

Answer 2 · 2018-03-12T01:43:24

#-4#

We can substitute #-3# for #x# and simplify:
#f(x)=2x+2#
#f(-3)=2(-3)+2#
#f(-3)=-6+2#
#f(-3)=-4#
So #f(-3)=-4#.