PLEASE HELP ASAP Which steps would you use to solve this equation? Check all that apply.

p + 7 = 12

Subtract 7 from both sides of the equation.
Subtract 7 from 7.
7 – 7 = 0 and 12 – 7 = 5, so p = 5.
Substitute 12 for p to check the solution.
Substitute 5 for p to check the solution.

In one day there are too high tides into low tides and equally spaced intervals the high tide is observed to be 6 feet above the average sea level after six hours passed a low tide occurs at 6 feet below the average sea level in this task you will model this occurrence using a trigonometric function by using x as a measurement of time assume the first high tide occurs at x=0. a. what are the independent and dependent variables? b. determine these key features of the function that models the tide: 1.amplitude 2.period 3.frequency 4.midline 5.vertical shift 6.phase shift c. create a trigonometric function that models the ocean tide for a period of 12 hours. d. what is the height of the tide after 93 hours?