In this problem, the total MUST be $1.10 AND the bat MUST be $1 more than the ball. Those were the parameters given in the problem. If the bat was $1.10 and ball $.10, then the $1.10 combined cost requirement would not be met (combined cost of $$1.20). Hopefully that makes sense.

]]>This is confusing me,why did 0.10 plus 1 mean the bat cost 1.10 and making the total 1.20. ? ]]>