Which pair of equations represents two perpendicular lines? option a: -3x +2y = 10 and 3y = 2x +12 option b: 2x + 5y = 45 and y + 2/5x = -9 option c: x= 4y +4 and x +4y=4 option d: 7x + 4y= 20 and y-3=4/7x

For the equation of the line expressed as Ax + By + C = 0, the value of the slope (m) is calculated by -A / B. For perpendicular lines, the slope of one should be the negative reciprocal of the other. From the choices given, the lines that are perpendicular is Option A. 

The answer would be 13.5 minutes.

Not sure what the question is but i hope this x = years100 * x