Answer:
9:15 and 18:30
Explanation:
To determine which ratios are equivalent, we reduce each one to its lowest form and see if they are the same.
[tex]\begin{gathered} 9\colon15=3\colon5 \\ 18\colon30=3\colon5 \end{gathered}[/tex]Next:
[tex]\begin{gathered} 21\colon25=21\colon25 \\ 30\colon50=3\colon5 \end{gathered}[/tex]Next we have:
[tex]\begin{gathered} 3\colon5=3\colon5 \\ 5\colon10=1\colon2 \end{gathered}[/tex]Finally:
[tex]\begin{gathered} 5\colon6=5\colon6 \\ 20\colon24=5\colon6 \end{gathered}[/tex]Therefore, the ratios which are equivalent are Options A and D.
