1) Always be polite and professional.
2) Specifically address the points that you disagree with.
3) Provide Evidence.
4) Close with a brief summary of your rebuttal.
8+6+1 =15
-a
-2b-3b =-5b
-3c
15-a-5b-3c is the answer
12 units. Hope it helps. :-)
R=25
a^2+b^2=c^2
7^2+24^2c^2
49+576=c^2
625=c^2
c=25