Question 688080
Find the domain of the functions and express the answer in interval notation. Explain in words or show the calculations for full credit. 
a) f(x)=10x+1
This is a straight line with slope 10 and y-intercept=1
domain: (-∞,∞)
..
b) g(x)=6x^2-9x
this is a parabola that opens upwards
domain: (-∞,∞) 
..
c) f(x)=13/(x+9)
this function has a vertical asymptote x=-9
domain: (-∞,-9) U (-9,∞)
.. 
d) g(x)=√7x - 14
this is a sqrt function which starts at 0
domain: [0,∞)
.. 
e) f(x)=2x^2/x + 11
this function has a vertical asymptote x=-11, and a slant asymptote
domain: (-∞,-11) U (-11,∞)