Tracey’s dog weighed 38.5 pounds. tracey weighed her dog and found that the dog lost 1/2 pound each month for three months. tracey used the expression 38.5 + 3(0.5) to find her dog’s weight at the end of the 3 months. what is the error in tracey’s expression? a. tracey’s dog weighed more in 3 months and the expression she wrote will result in a lower weight. . tracey should have added 3 and 0.5 instead of multiplying to find the dog’s new weight. c. tracey should have multiplied 3 and 38.5 and then subtracted 0.5 to find the dog’s new weight. d. tracey’s dog is losing weight so she should have used -0.5 instead of 0.5 in the expression.