Answer:
y is 6.5 because it's kind of a ratio, you just need to find out what number to divide them by or multiply them by in this case, it was 13÷2 =6.5
** Calculation is based on 52 weeks per year.

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12/84=1/7
divide the numerator and denominator of 12/84 with 12
It is 10 units². The difference between x and x is 5 and the difference between y and y is 2. 5 times 2 is 10. Hope this helps!
It can either be equivalent to 11 or 18.