Answer:

Step-by-step explanation:

Answer:
any # where -2<=x<7
Step-by-step explanation:
(x-7) would be negative and (x+3) positive, resulting in f(x) being negative.
Answer:
4x+2
Step-by-step explanation:
2(2x+1)
4x +2
you distribute the the 2
Answer:
It represents both the positive and the negative square root of 256.
Step-by-step explanation:
16*16=256
-16*-16=256
They are both valid answers.