Question

Which expression is equivalent to this quotient?

Answer 1

Answer:    $B. \: \: \: \dfrac{5}{x+5}$

Step-by-step explanation:

$\dfrac{\dfrac{1}{x+5} }{\dfrac{x+3}{5x+15} } =\dfrac{1}{x+5} \times \dfrac{5x+15}{x+3}=\dfrac{1}{x+5} \times \dfrac{5(x+3)}{x+3}=\dfrac{1}{x+5} \times 5 = \dfrac{5}{x+5}$