Ineed ! can some tell me whats 1 1/4+1.35+2.56+2 7/10 and show the work

Lisa has three classes that each last 50 minutes. what is the total number of minutes of the three classes

Twice the sum of a number and 4 is equal to three times the difference of the number and 7. find the number.

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?