Question

fing f(-3) for f(x)= 2/5x-2

Answer 1

f(-3)=2/5(-3)-2
=2/-15-2
=2/-17

Answer 2

you have a function containing x
f(x)= 2/5x-2

but you want a function containing -3
you have an f(x) so if you had f(-3) where ever there was an x in f(x) you would now have a -3 in that place instead
so you replace all x's with -3

Answer 3

Woops, should there or should there not be parenthesis around the denominator?