Need help, dont know where to start

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

The description below represents function a and the table represents function b: function a the function is 5 more than 3 times x. function b x y −1 2 0 5 1 8 which statement is correct about the slope and y-intercept of the two functions? (1 point) their slopes are equal but y-intercepts are not equal. their slopes are not equal but y-intercepts are equal. both slopes and y intercepts are equal. neither slopes nor y-intercepts are equal.

What is the unit rate of, 75% high fiber chimp food to 25% high protein chimp food.