<u><em>16.1 is the final answer. </em></u>
<em>Product- it's going to be multiply by the numbers only.</em>

<em>You can also round up to the nearest tenths is 16.0</em>
<em>Hope this helps! And thank you for posting your question at here on brainly, and have a great day. -Charlie</em>
C + a = 138.....c = 138 - a
5.10c + 8.70a = 995.40
5.10(138 - a) + 8.70a = 995.40
703.80 - 5.10a + 8.70a = 995.40
-5.10a + 8.70a = 995.40 - 703.80
3.60a = 291.60
a = 291.60/3.60
a = 81 <===
24 - 16 = 8
The percent increase is 8
La equacion seria 4n+17=221
221-17=204
4n=204 204/4=51
n=51
i believe the answer would be - recreational drug user.
hope this helps you out!