Question 185290
h(x)=3x^2+5-3  domain is all X, since no value of x results in an invalid h(x)
m(x)=5/x^2-9 domain is all X except 3 and -3, since those two values of x results in a denominator that is 0. Which is not allowed
l(x)=5x-4   domain is all X, since no value of x results in an invalid l(x)
g(x)=7x+4/x+4 domain is all X except 4, since that value of x results in a denominator that is 0. Which is not allowed