In the equation above, what is the value of d ?
A. -4
B. 2
C. 4
D. 6
Answer:C
In the equation above, what is the value of d ?
A. -4 B. 2 C. 4 D. 6
Explanation: CWhenever the question includes variables and the answer choices are numbers, think Plugging In the Answers. In (A), d = -4, and the equation becomes . Solve both sides of the equation to get , or = . Reduce both fractions to get -13 = -5. This is not true, so eliminate (A). In (B), d = 2, and the equation becomes . Solve both sides of the equation to get , or = . Reduce both fractions to get = . Eliminate (B). In (C), d = 4 and the equation becomes . Solve both sides of the equation to get , or = . Reduce both fractions to get = . The correct answer is (C).