A triangle has side lengths of (7.4b + 6.3c) centimeters, (1.1b + 8.7d) centimeters, and (3.5d + 2.1c) centimeters. Which expression represents the perimeter, in centimeters, of the triangle? 17.1cd + 12bd 5.6d + 150 + 8.5b Submit Answer 9.8bd + 13.7bc + 5.6cd 12.2d + 8.5b + 8.40​