Final answer:
Without additional context or a clear pattern, it's not possible to determine a single exact equivalent expression. However, -2.73 could be reached by summing certain numbers like -0.85, -1.52, and -0.36. Further information about the number sequence or operations applied to it would be required for a definitive answer.
Step-by-step explanation:
The student has asked which expression is equivalent to -2.73. To find an equivalent expression, we can add or subtract the same number to/from each number in the sequence until we reach -2.73. The terms listed are not in a clear pattern that we can directly equate to -2.73, but we can recognize that a combination of these numbers could be summed to reach -2.73.
For instance, we can combine several numbers from the negative set: -0.85, -1.52, and -0.36 (which is not explicitly listed but could be implied as a possible term), to get -2.73. (-0.85 - 1.52 - 0.36 = -2.73).
Alternatively, we could look for a pattern or a mathematical operation that could generate -2.73. However, based on the information provided, we do not have a clear operation or function that transforms the numbers listed into the desired number. Therefore, understanding the context or additional rules about how these numbers are generated is necessary to provide a definite equivalent expression for -2.73.