-9,7 with a rotation of 180°

Find the cosine function that is represented in the graph.

Two times a number plus three times another number equals 4. three times the first number plus four times the other number is 7. find the numbers

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?