Answer:
C≈138.08mm is your answer
17 and -17 because the opposite of positive is a negative and also the numbers has to be the same in order to be opposites
Scalene, and isosceles both have and acute angles in them
Your answer should be D because 13-10=3 and 10-3=7 (2, 7)!
Fraction: 68/80 (numerator is correct answers & denominator is total amount).
percent: 68/80=.85 move the decimal two times to the right. you get 85% as final answer.
decimal: 68/80=.85 .85 is final answer.