Yea me ether did you ever find the answer
$810 because if you use the simple interest formula (s=p*r*t), you get $810 hope this helped!
The whole number of minutes that Gianna complete each week as a function of x and y:

Since the above number is greater than 450 minutes, we get the inequality:

Also, "she can complete at most 10 workouts this week" so we deduce the inequality:

Therefore, the system of inequalities is the following:


The above system has many solutions, for example :
4.998370298991988e+137
Well, thats a large number.
Trust me, im a "prodigy"