Final answer:
The expression 13 x 1/4 is the only one equivalent to the mixed number 3 1/4.
Step-by-step explanation:
The student is asked to identify which expressions are equivalent to the mixed number 3 1/4. Considering each of the given expressions:
26 x 1/8 = 26/8 = 3.25, which is not equal to 3 1/4 (3.25 does not equal 13/4).
2 1/8 x 2 = 17/8 x 2 = 34/8 = 4.25, which is not equal to 3 1/4 (4.25 does not equal 13/4).
4 x 13 = 52, which is definitely not equal to 3 1/4.
1/4 x 3 = 3/4, which is not equal to 3 1/4.
13 x 1/4 = 13/4, which is equal to 3 1/4.
So the expression 13 x 1/4 is the only one that is equal to 3 1/4.