mikylieparrish27 mikylieparrish27 02-03-2021 Mathematics contestada Can someone please help with this? I am so confused substitute a -13 ; b = -9 ; C = 2 and evaluate each expression. 17. 2c + b - a + 14 18. -(-2a) + 16 - b2 19. -3b + C - a + 4