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- - - - -_N - - - - - P = 19−C The given equation relates the positive numbers P, N, and C. Which equation correctly expresses C in terms of P and N? C =
Correct answer: D (parsed from the explanation — this source omits an answer key for this item)
Explanation
Choice D is correct. It’s given that the values of P, N, and C are positive. P=19- Therefore, dividing each side of the given equation by N yields C. N 19 P-19=- Subtracting from each side of this equation yields C. Dividing each N - 19-P= =19-P side of this equation by 1 yields C, or C . N N = -19 Choice A is incorrect. This equation is equivalent to P NC , not = 19- =19- P N^ Ch. Choice B is incorrect. This equation is equivalent to P NC, = 19- not P N^ Ch. Choice C is incorrect. This equation is equivalent to = -19 = 19- P N^C h, not P N^ Ch. 38 SAT PRACTICE TEST #6 ANSWER EXPLANATIONS SAT ANSWER EXPLANATIONS n MATH: MODULE 1
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