Question

Identify the domain of the following rational expression: 7x/3x + 15a) All real numbers except 15.b) All real numbers except 5.c) All real numbers except -5.d) All real numbers except -15.

Answer 1

we have the expression

$\frac{7x}{3x+15}$

Remember that the denominator cannot be equal to zero

so

For

3x+15=0

3x=-15

x=-5

therefore

the domain is all real numbers except for x=-5

Option C