3. \( \angle J \) and \( \angle M \) are base angles of isosceles trapezoid JKLM. If \( m \angle J = 17 x + 3 \) , and
\( m \angle M = 12 x + 13 \) , find \( m \angle K \) .
A. \( 2\)
B. \( 37 \)
C. \( 143 \)
D. \( 71.5\)
Pregunta
Answer
C. 143
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