T= # of rental hours
Reservation Fee= $31
Per Hour Fee= $7.40

Multiply number of hours rented by the cost per hour, add that total to the reservation fee. The total needs to be less than $97.60.

Res Fee + ($ per hr * # hrs) < $97.60

$31 + $7.40t < $97.60
subtract 31 from both sides

7.40t < 66.60
divide both sides by 7.40

t < 9

ANSWER: To spend less than $97.60, they need to rent the room less than 9 hours.

Hope this helps! :)

7 0

3 years ago

Can someone help me with number 9 please? thanks

Zina [86]

Each of the 223 million people put $10 back into circulation every year.

$\sf 223,000,000\times 10=2,230,000,000$

So every year, this much money goes into circulation, and this is how much that goes into circulation the first year.

$\sf 2,230,000,000+2,230,000,000=4,460,000,000$

This is how much that will be in circulation after 2 years.

$\sf 4,460,000,000+2,230,000,000=6,690,000,000$

This is how much that will be in circulation after 3 years.

So we can create the table:

$\sf\left[\begin{array}{cc}\sf Years&\sf Money&\sf 1&\sf 2,230,000,000\\\sf 2&\sf 4,460,000,000&\sf 3&\sf 6,690,000,000\end{array}\right]$

5 0

3 years ago