Your classmate is starting a new fitness program. He is planning to ride his bicycle 45 minutes every day. He burns 6 calories per minute bicycling at 11 mph and 9.75 calories per minute bicycling at 15 mph. How long should he bicycle at each speed to burn 300 ​calories?

Find the number of liters in 12.8 gal of gasoline. round to the nearest hundredths

The linear combination method is applied to a system of equations as shown. 4(.25x + .5y = 3.75) → x + 2y = 15 (4x – 8y = 12) → x – 2y = 3 2x = 18 what is the solution of the system of equations? (1,2) (3,9) (5,5) (9,3)

Every weekday, mr. jones bikes from his home to his job. sometimes he rides along two roads, the long route that is shown by the solid lines. other times, he takes the shortcut shown by the dashed line. how many fewer kilometers does mr. jones bike when he takes the shortcut instead of the long route?