crazykid121828 crazykid121828 08-05-2018 Mathematics contestada Determine the sum: (7j9k − 3j2k3) + (−4j9k + 12j2k3). 3j9k + 9j2k3 7j22k8 3j18k2 + 9j4k6 4j9k + 8j2k3