Please help me
I will give brainlist please explain

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

Anyone? 15m is what percent of 60m; 3m; 30m; 1.5 km?

(05.03 mc) part a: explain why the x-coordinates of the points where the graphs of the equations y = 4x and y = 2x−2 intersect are the solutions of the equation 4x = 2x−2. (4 points) part b: make tables to find the solution to 4x = 2x−2. take the integer values of x between −3 and 3. (4 points) part c: how can you solve the equation 4x = 2x−2 graphically? (2 points)