Find the sum. Write your answer in simplest form. 4 1/6 + 5 4/7

9 31/42
9 5/13
10 11/42
10 11/31

Jacob signs up to work for 2 1/2 hours at the school carnival. if each work shift is 3/4 hour, how many shifts will jacob work? (i just want to double check : |, for anybody that responds! : )

Two cyclists 84 miles apart start riding toward each other at the samen time. one cycles 2 times as fast as the other. if they meet 4 hours later what is the speed (in miles) of the faster cyclists

Micheal is 4 times as old as brandon and is also 27 years older than brandon. how old is micheal