Given that the product of d and 4 equals a, which expression correctly represents the sum of d and 4 in terms of a?

Correct answer marked below

a + d

4a + 4

4 (a + 4)

\frac{a + 4}{4}

\frac{a}{4} + 4

Correct

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Explanation

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Official Explanation

Official

For all real numbers a and d such that the product of d and 4 is a, we have:

4d = a

. Solving for

d

gives us [m]d =…

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What this question tests

Your ability to manipulate linear and quadratic expressions, substitute unknowns, and solve equations under time pressure.

Losing a sign when moving terms across the equals sign, or dividing both sides by a variable that could equal zero.