➭Doing it all using mental math
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Answer:
105 is the least common denominator
Step-by-step explanation:
Since 7, 5 and 3 are all prime.
LCM would be 7×3×5 = 105
14.14
10^2 + 10^2 = c^2
100 + 100 = c^2
200 = c^2
c = 14.14