NEEED HELP QUICK PLS PLS pls pls pls .

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

Someone answer asap for ! michele pushes a box d meters across a floor. she uses a force f, in newtons, to push the box. she pushes the box for t seconds. the formula p = fd/t calculates the power, p, in watts, that it takes for michele to complete the task. solve the formula for d.

Ijust need these 2 questions answered (the second pic is just confirmation i'm not confident in that answer)