How do to soving problems in math what is a trick

Josephine has a great garden with and area of 2x2 + x - 6 square feet

Does the point (1, sqrt 7) lie on circle shown.

It is saturday morning and jeremy has discovered he has a leak coming from the water heater in his attic. since plumbers charge extra to come out on the weekends, jeremy is planning to use buckets to catch the dripping water. he places a bucket under the drip and steps outside to walk the dog. in half an hour the bucket is 1/5 of the way full. what is the rate at which the water is leaking per hour?