A mixed number is in the form x y/z while a improper fraction (76/10) is in the form y/z. We can separate the fraction into two parts. One is 70/10 which = 7 and the other is 6/10 which simplifies to 3/5. So, in order to express 76/10 as a mixed number we must express it as 7 3/5 or 7 6/10. 7 3/5 is equal to 7 6/10.
I hope this helped you!
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When you rotate the ef counter lock 180 degrees, the new line e'f' will have the same length as ef.
3x _> 3.0 - 2.4
= 3x _> 3/5
= 1/5
