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Yesterday, 19:13

If x is a number that is 7 more than y, how do you express x as a function of y?

A. x = f (y) = 7 + x

B. x = f (y) = 7 + y

c. y = f (x) = 7x

D. y=f (x) = y-7

E. y=f (x) = 7+y

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Answers (1)
  1. Yesterday, 19:24
    0
    B.

    Step-by-step explanation:

    We are given x is a number that is 7 more than y.

    This means when you add 7 to y you get x.

    So the equation for this is 7+y=x.

    We want x as a function of y. So we want to replace x with f (y).

    This means we have the function 7+y=f (y) or f (y) = 7+y by symmetric property of equality.

    Your answer is B.
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