Given r(x) = 6x

Question

x + 8
,find the following.

r(−1)= __
r(-3)= __
r(1/2)= __
r(0.1)=__
r(10,000)=___

Answer 1

First off, how about typing r(x) on one line? Is there a division in there somewhere? If so, do you mean

r(x) = 6x/(x+8)

??

Whatever r(x) is, to evaluate at some value, just substitute that value in everywhere there's an x:

r(2) = (6*2)/(2+8) = 12/10

Now just plug and chug, and come on back with your work if you get stuck.