(a+b+c)/2. this is your answer. if it had the numbers i would solve it fully, but it only has variables.
Answer:
x = 42.67
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Answer: centimeter
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Answer:
Integers are always closed under subtraction, addition and multiplication, not division though. Hope this helped! :D
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Answer:
I think Rv = 37x but if you think not then Go with You're answer
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goodluck! :)