Question

Question #36b47

Answer 1

`A=1/((x+y))`

Explanation:

When something is 'proportional to' another thing, that usually means they are both rational relations that are equivalent.
For example, `2/4=1/2`

Therefore, since "A is proportional to the reciprocal of (x+y)", you are being told that
`A=1/((x+y))`

Why is it 1 over (x+y)? Reciprocals are just flipping fractions upside down, and since (x+y) = `((x+y))/1`, all you need to do is flip that.