Let the total bill be x. We have:
<span>0.15x > 21 <-- Since 15% is 0.15 using inequality calc. x </span>>$140
Answer:
0.275
Step-by-step explanation:
To solve, simply do this:

Then you'll get the answer, -7/16
You could answer this question easily by applying synthetic division:
_______________
-5 / 4 14 -9
-20 30
---------------------------
4 -6 21
The polygon would have 18 sides. Hope this helps!