You have 40 minutes to exercise at the gym, and you want to burn 300 calories total using both machines. How much time should yo
u spend on each machine?A photo shows an elliptical trainer marked as 8 calories per minute and a stationary bike marked as 6 calories per minute.
1 answer:
Answer
8(40-y) + 6y =300
320 - 8y + 6y =300
-2y=-20
y=10
This leaves x to be 30.
You should spend 30 minutes on machine 1 and 10 minutes on machine 2.
Step-by-step explanation:
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<span>9 divided by 3/2
= 9 (2/3)
= 6
--------------</span>
The perfect square 
can be expanded as follows:
So, we have to think of the term 
as 
, which implies 
.
Thus, we have to add 
, i.e. 16, to complete the perfect square:
