Identify the equivalent expression for √x+3

answers:
a. 3x^1/2
b. (x+3)^1/2
c. x^1/2 + 3
d. (3x)^1/2

Which quadratic function best fits this data? x y 1 32 2 78 3 178 4 326 5 390 6 337 a. y=11.41x2+154.42x−143.9 b. y=−11.41x2+154.42x−143.9 c. y=11.41x2+154.42x+143.9 d. y=−11.41x2+154.42x+143.9

Anyone know? will mark brainliest if you're correct!

The border line of the linear inequality 4x + 7y < 5 is dotted true or false?