Can any one help with this

The verbal translation for the difference of m and 7 increased by 15

Find the domain of the following expression: 1/(√x)-2

Select the correct answer from each drop-down menu. a system of equations and its solution are given below. system a complete the sentences to explain what steps were followed to obtain the system of equations below. system b to get system b, the equation in system a was replaced by the sum of that equation and times the equation. the solution to system b the same as the solution to system a.]