Answer:
C.
Step-by-step explanation:
Hi there!
To answer this, we must set it up as

Now we just use the distributive property to solve.
this becomes 
I hope this helps!
Answer:
k=6
Step-by-step explanation:
18=k+12
you need to isolate k so you subtract 12 from both side
6=k
Answer:
300
Step-by-step explanation:
3 would be extremely low
30 would be low
300 would be about right
3,000 lets not talk about this
Hope this helps