Juan ate 1 1/6 of a candy bar. ryan ate 4/7 of a candy bar. how many candy bars did they eat all together?

This is different from the first one can someone me

Three times the sum of a number and seven is negative thirty-six. what is the number?

Bobby bought 1.12 pounds of turkey at a cost of 2.50 per pound. carla bought 1.4 pounds of turkey at a cost of 2.20 per pound. who spent more and by much?