Work out h, the height of the triangular cross section

The table respent two linear functions the equation respented by the first tables is given

It takes a total of 6 hours to fill up an inground backyard pool using a standard house. a function can represent this situation to represent the amount of water in the pool until it is full a function of time the hose is running. determine the domain for the function

Which expression is equivalent to 8(k + m) − 15(2k + 5m)?