Help plss i will make you brainl

Complete the solution of the equation. find the value of y when x equals to 28 x+3y=28

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?

Graph the system of inequalities presented here on your own paper, then use your graph to answer the following questions: y < 4x − 8 y is greater than or equal to negative 5 over 2 times x plus 5 part a: describe the graph of the system, including shading and the types of lines graphed. provide a description of the solution area. (6 points) part b: is the point (5, −8) included in the solution area for the system? justify your answer mathematically. (4 points)