Final answer:
To determine when AOL and Yahoo Internet Service plans cost the same, set up an equation based on their monthly and hourly charges. Solve for the number of hours when AOL's $19.99 monthly plus $2.00 per hour equals Yahoo's $14.99 monthly plus $2.50 per hour. The costs are equal at 10 hours of use per month, with a monthly charge of $39.99.
Step-by-step explanation:
To find out how many hours you would need to use the internet for the monthly charges from AOL and Yahoo to be equal, we need to set up an equation based on the given prices. AOL charges $19.99 per month plus $2.00 per hour, while Yahoo charges $14.99 per month plus $2.50 per hour. Let's use x to represent the number of hours of internet usage.
AOL's monthly charge will be:
19.99 + 2.00x
Yahoo's monthly charge will be:
14.99 + 2.50x
Setting these two expressions equal to each other to find when the costs are the same gives us:
19.99 + 2.00x = 14.99 + 2.50x
Subtract 2.00x from both sides to get:
19.99 = 14.99 + 0.50x
Subtract 14.99 from both sides to isolate the variable term:
5.00 = 0.50x
Finally, divide both sides by 0.50 to find the number of hours x:
x = 10
Therefore, you would need to use the internet for 10 hours for the charges from AOL and Yahoo to be equal. The monthly charge would be:
19.99 + 2.00 * 10 = 39.99