Answer:
440h is the expression. When 3 1/4 is evaluated you get 1,430 calories burned.
Explanation:
440 represents the number of calories she burns per hour. To represent the hour, we place a variable which is h. After we write the expression, we substitute 3 1/4 for h. When I did this, I turned 3 1/4 into an improper fraction, which was 13/4, and then divided 13 by 4 to get 3.25
Multiple 3.25 by 440 to get an answer of 1,430 calories burned.
Hope this helps :)