Answer:
6 and 5/12 hours
Explanation:
On Friday, she babysat 3 and 7/12 hours, this means that she babysat 43/12 hours
On Saturday, she babysat 2 and 5/6 hours, this means that she babysat 17/6 hours
To know how many hours she babysat on Friday and Saturday combined, all you have to do is add the hours she babysat in the two days as follows:
hours combined = 43/12 + 17/16 = 77/12 hours = 6 and 5/12 hours
Hope this helps :)
