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Given: AJKL - AMNP, JK = 12, LJ = 5, PM = 2x - 3, m∠L = 67, m∠K = y + 4, and m∠N = 2y - 15. Solve for x and y.

A) x = 4, y = 35
B) x = 7, y = 21
C) x = 8, y = 30
D) x = 10, y = 20

User Karl Anka
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Final answer:

To solve for x and y in the congruent parallelograms AJKL and AMNP, we compared corresponding sides and angles. However, after solving the equations, it seems there is an error as none of the options match the expected results of x = 4 and y = 19, indicating a possible mistake within the question or provided answer choices.

Step-by-step explanation:

To solve for x and y, we'll use the properties of the given parallelograms AJKL and AMNP. Since the parallelograms are congruent, their corresponding sides and angles are also congruent. This means JK = MN and LJ = PM, and m∠L = m∠M and m∠K = m∠N.

  • Since JK = 12 and MN corresponds to JK, MN = 12.
  • LJ = 5 and PM corresponds to LJ, which means PM = 5. But PM is also given by the expression 2x - 3. Therefore, 2x - 3 = 5 and solving for x gives x = 4.
  • For the angles, we have m∠L = m∠M = 67° (given).
  • m∠K = y + 4, and m∠N = 2y - 15. Since m∠K = m∠N, we set y + 4 = 2y - 15 and solve for y. This calculation provides y = 19. However, y must be reevaluated carefully as only provided choices should be considered for the correct answers.
  • Now we must verify against the given options for x and y. With x = 4, we now recheck m∠K = y + 4 and m∠N = 2y - 15. If y = 35, then m∠K = 35 + 4 = 39, which is not congruent with m∠N = 2(35) - 15 = 55, this is incorrect. Hence, option A is incorrect and similarly we analyze other given options.
  • After analyzing all options with above steps, option B fits correctly as PM = 2(7) - 3 = 11 (this should be 5 when correct, hence even B doesn't truly satisfy our equations; this suggests a possible error in the question details or the options provided).
  • Option C and D can be discarded based on the correct solving method described.

Therefore, there seems to be an error as none of the given options match the expected results of the correct values of x = 4 and y = 19. An investigation into whether there is a typo in the question or the options would be required for a correct solution.