Write each of the following rational numbers with positive denominators: \(\dfrac{5}{-8}, \dfrac{15}{-28}, \dfrac{-17}{-13}\).
\(\dfrac{5}{-8} = -\dfrac{5}{8}\)
\(\dfrac{15}{-28} = -\dfrac{15}{28}\)
\(\dfrac{-17}{-13} = \dfrac{17}{13}\)
Multiply numerator and denominator by -1 to make denominator positive.