Answer:
25.38
Step-by-step explanation:
i did it quick so its prob wrong
The amount of time spent on the elliptical is; 18 minutes.
She burns 15 calories per minute on elliptical
She burns 12 calories per minute on the treadmill
Let the number of minutes spent on elliptical be x
Let the number of minutes spent on treadmill be y.
She spent a total of 1 hour which is 60 minutes on both machines in total.
Thus;
15x + 12y = 774 - - - (eq 1)
x + y = 60 - - - (eq 2)
From eq 2, x = 60 - y
Thus;
15(60 - y) + 12y = 774
900 - 15y + 12y = 774
3y = 900 - 774
3y = 126
y = 126/3
y = 42 minutes
Thus;
x = 60 - 42
x = 18 minutes
In conclusion, the amount of time spent on the elliptical is 18 minutes.
Read more about simultaneous equations word problems at; https://brainly.com/question/15165519
