Dr. Burrows is measuring the weight of a substance for a science experiment. He added a mystery substance (m) to his experiment. Dr. Burrows used the equation 13.93 + m = 18.0 to find out how much he added. How much of the mystery substance (m) did he add to his

Answer 1

Dr. Burrows added 18.0 - 13.93 = <<18.0-13.93=4.07>>4.07 grams of the mystery substance. Answer: \boxed{4.07}.