Answer:
52.75.
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Step-by-step explanation:
A. Line a and line b
A, yes.
63:60, 21:20:
The difference between 60 and 20 is *3. If you do that to 21, you get 63. So a , yes.
1 5/6, 2 1/3, 2 3/5
Step-by-step explanation:D