Can anybody tell me the answers to these questions because i'm really confused

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

Need match the functions with correct transformation. f(x) = -3x f(x) = |x-1|+3 f(x) = √(x+3) 1/2x² f(x) = (x+1)²-3 4|x| 1. compress by a factor of 1/2 2. stretch by a factor of 4 3. shift to the left 3 4. shift to the left 1 5. shift up 3 6. reflection

Determine which postulate or theorem can be used to prove that lmn =nmo