I need some help determing what ocean Australia is located in. The question on my study guide says, "Australia is located in the southeast __________ Ocean. I see it is surrounded by the Southern Ocean, Indian Ocean, and Pacific Ocean. I'm not sure which one to pick. Thanks.

Well, it is located in the south WEST Pacific

and NORTH of the southern ocean
but indeed in the
SOUTHEAST Indian Ocean.
The question is a bit silly because all 3 oceans touch Australia but it is Southeast only of the Indian Ocean

Many geographers don't recognize the Southern Ocean as a separate ocean. Since your description is the southeast part of an ocean, which of the three oceans must it be?

http://www.yourchildlearns.com/online-atlas/images/indian-ocean-map.gif

To determine what ocean Australia is located in, you can examine the information you provided about the surrounding oceans. Australia is indeed surrounded by the Southern Ocean, Indian Ocean, and Pacific Ocean. However, the key hint in your question is that Australia is located in the "southeast" part of that ocean.

Based on this, you can conclude that Australia is located in the southeast Pacific Ocean.