Answer:
you subtract 7 from both sides
Step-by-step explanation:
<h2>
Hello!</h2>
The answer is:
The correct option is:
A. $0.49
<h2>
Why?</h2>
From the statement, we know that the iHome is used on average three hours a day, and we are asked to find the cost for a week, so first, we need to calculate the total hours that the iHome is used for, and then, calculate the kilowatt-hour consumption rate.


Now, we must remember that:

So,

Then, calculating the cost, we have:

Hence, we have that the correct option is:
A. $0.49
Have a nice day!
Answer:
Step-by-step explanation:
3 times 60 = 180 minutes
10 * 60 = 600 minutes
600/20 = 30 * 3 = 90 hours