Answer:
13
Step-by-step explanation:
I am amusing you are looking for the hypotenuse since this is middle school.
If you have the legs and are looking for the hypotenuse you use the Pythagorean Theorem 
The legs are a and b, and the hypotenuse is c
The work would look like this

extra notes
- I rounded to 13
- If you didn;t know you cancles exponents with roots
so the
is cancled by aka
Hope this helped :)
I got the same question and the answer is D) 1.65 billion
Answer:
A. no solution
Step-by-step explanation:
x+1=x-1-1
x+1=x+(-2)
x-x = 0
1=(-2)
x = no solution
Answer: 3 (include unit in your answer, as it was not mentioned in question)
Step-by-step explanation:
5.5% of 1200 =
1200/100 x 5.5 = 66
Time = 198/66 = 3
put the units in, if its 5.5% per annum or months or days, since it wasnt mentioned in the question :)
To be a function, each x - component of order pair must have unique y - component.
Answer: I and IV