Joey chestnut is trying to break his own world record. after 1 minute of competition, joey has eaten 10 hotdogs. joey wants to known the number of hotdogs per minute that he needs to eat for the next 9 minutes to break his own record.

Before we start the math you must know that he is trying to beat his record so we can't do 72-10 lets do 73 instead because that is the least he can eat to beat his record so first do 73-10 that is 63 now he only has 9 min left to eat 63 more hot dogs just do 63/9 and that gets you 7 he must eat at least 7 hot dogs every min for 9 min to beat his record.

$22. if larry's profit were to minimize by one for every hour his store were to be closed, we would subtract 30 by 8.