Question: Determine whether the planes are parallel, perpendicular, or neither. 3 x + 1 2 y 9 z = 1 , 2 1 x + 4

Determine whether the planes are parallel, perpendicular, or neither.
3x +12y 9z =1,21x +42y +49z =0
parallelperpendicularneither
If neither, find the angle between them. (Use degrees and round to one decimal place. If the planes are parallel or perpendicular, enter PARALLEL or PERPENDICULAR, respectively.)

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