Posted 17 Jun 2013 How much does the baby weigh if the mother weighs 100 pounds more than the combined weight of the baby and the dog, and the dog weighs 60 percent less than the baby? 0 Share this post Link to post Share on other sites

0 Posted 17 Jun 2013 25 lbs nice work! Please elaborate on your answer. 0 Share this post Link to post Share on other sites

0 Posted 19 Jun 2013 25 lbs nice work! Please elaborate on your answer. Basic system of equations with 3 variables...from the statements: Let b = baby's weight, d = dog's weight, w = woman's weight... if the mother weighs 100 pounds more than the combined weight of the baby and the dog EQUATION 1: b + d + 100 = w the dog weighs 60 percent less than the baby EQUATION 2: d = 0.4*b and then from the picture, we know EQUATION 3: b + d + w = 170 Then just solve the system Substitute equation 2 into equations 1 and 3: 1) b + 0.4b + 100 = w and 3) b + 0.4b + w = 170 1) 1.4b + 100 = w and 3) 1.4b + w = 170 Then substitute equation 1 into equation 3: 1.4b + 1.4b + 100 = 170 Solve for b: 2.8b = 70 b = 25 0 Share this post Link to post Share on other sites

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How much does the baby weigh if the mother weighs 100 pounds more than the combined weight of the baby and the dog, and the dog weighs 60 percent less than the baby?

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