Determine if the pair of lines is parallel, perpendicular, or neither. 3y=1+2x. 3x+2y=12

  perpendicular

Step-by-step explanation:

Solving each equation for y, you have ...

  y = 2/3x +1/3 . . . . first equation

  y = -3/2x +6 . . . . second equation

The x-coefficients (slopes) have a product of -1, so the lines are perpendicular.

the sum of all the angles in a triangle are equal to 180

so you can add   the 3 given angles together to equal 180:

5y + 2y + 2y = 180

or since all three angles have the same letter, combine the 3 angles to equal 180:

9y = 180