Answer:
Hi there!
The answer to this question is square, and triangle
Answer: 
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Work Shown:
Use the distance formula.

Or you could use the pythagorean theorem, which is how the distance formula is set up.
Answer:
$8.07
Step-by-step explanation:
20-((5*1.59)+3.98)=8.07
Answer:
13
Step-by-step explanation:
It would be 13 because you would square the 5 and 12 to get 25 + 144 which equals 169. Then you would take the square root of 169 which is 13. Hope this helps! :)