cccabrera cccabrera 12-10-2021 Mathematics contestada which pair of lines are parraell? a.) x-5y = 10; y=5x-2 b.) x+y = 0; y=x+7 c.) 2x-3y=9; 4y =6x-20 d.) 4x-8y=8; y=2x+2 e.) 9x-3y=12; y=3x-10