1. When you spent 11.9 minutes on the elliptical trainer and then did circuit training for 27.4 minutes, your fitness app says you burned 389 calories. When you spent 17.8 minutes on the elliptical trainer and 16.5 minutes circuit training you burned 381.4 calories. How many calories did you burn for each minute on the elliptical trainer? How many calories for each minute of circuit training? 2. What is the solution of the system of linear equations 3x + 4y + 5z = 9 5x + 7y + 5z = 6 3. Consider the following system of linear equations 17.9x + 13.4y = 19.8 10x+14.8y = 2.4. What is the elementary row operation needed to make the first entry in row 2 equal to zero? 4. The sum of the measures of the angles of a triangle sum to 180 degrees. The sum of the measures of the second and third angles is 3 times the measure of the first angle. The third angle is 48.1 more than the second angle. Find the measure of the second angle. 5. The sum of the measures of the angles of a triangle sum to 180 degrees. The sum of the measures of the second and third angles is 3 times the measure of the first angle. The third angle is 17.8 more than the second angle. Find the measure of the third angle