To answer this question I tried to find a common multiple of 21 and 35 which I found to be 105. As they are in minutes 105 is 1 hour and 45 minutes; after this I found 1 hour 45 munutes after 7:30, I then got 9:15
9:15 is my answer
1 and they split the other in half
The greatest common factor is 12 because 12 times 3 is 36 and 12 times 7 is 84.
Hope this helps! :)
Its A because my class is litterally studing that now
