Final answer:
Without a full question specifying the ratios in question and their correlation, attempting to identify the missing number from equivalent ratios between A. 2, B. 5, C. 7 and D. 13 is not possible.
Step-by-step explanation:
Due to the lack of relevant information provided, I am not able to determine the correct answer to the question 'What number is missing from the equivalent ratios?' .
Typically, in order to find the missing number in an equivalent ratio, you would first need to know what other quantities are involved in the ratio.
For instance, if you have a ratio like 3:x = 9:30, you could solve for x by cross-multiplying and solving resulting equation. It would hence go like 3*30 = 9*x, which simplifies to 90 = 9x. When we solve for x, we find that x=10.
But without this information, it's impossible to arrive at a solid answer.A, B, C or D can be possible answers, depending on the full question.
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