Thread:HMcCoy/@comment-28838092-20140825225626/@comment-24808864-20140826004030

No problem dude. Keep working hard!

Here are the KA problems that are like your problems number 2 and 3. They don't have anything quite like your problem number 1.

https://www.khanacademy.org/math/algebra/algebra-functions/domain_and_range/e/domain_and_range_0.5