Pls help me with this questions pls. (pls don't spam)

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

The table shows the age and finish time of ten runners in a half marathon. identify the outlier in this data set. drag into the table the ordered pair of the outlier and a reason why that point is an outlier.

Change negative exponents to positive, then solve