Identify the polynomials of degree one.

a. x^3+4x+8
b. 76+5x
c. (x)^1/2+5x-6
d. 500+(45)^1/2x
e. 289y+6-76y
f. (37)^1x^1
g. (9x^2)^1/2+3
h. 89x^4+3y+5