Posted by Joy on Tuesday, July 30, 2013 at 3:48am.
There are two plans for renting a car. Plan A charges $10 per day plus a $50 onetime fee. Plan B charges $15 per day plus a $30 onetime fee. How many days must you rent the car for Plan A to be a better deal than Plan B?

Discrete Mathematics  Steve, Tuesday, July 30, 2013 at 4:35am
we need
50+10d < 30+15d
so, ...

Discrete Mathematics  Joy, Tuesday, July 30, 2013 at 4:43am
50 + 10d < 30 + 15d
10d <  10d
50 < 30 + 5d
30 30
20 < 5d
/5 < 5
4 < d
Please tell me if this is the right answer.

Discrete Mathematics  Steve, Tuesday, July 30, 2013 at 4:48am
Looks good to me.
If more than 4 days of rental, A is the better deal.
At d=4, A=B=90
After that, A grows more slowly than B.
Answer This Question
Related Questions
 Algebra 2  Plan A charges $5 per minute plus a one time monthly fee of $75 and ...
 Algebra 2  Juan is comparing the cell phone plans shown in the advertisement. ...
 Problem solving  A rental car agency charges $15 per day plus $.11 per mile to ...
 Problem solving  A rental car agency charges $15 per day plus $.11 per mile to ...
 Math  A rental car agency charges $15 per day plus $.11 per mile to rent a ...
 management science  Kim Davis has decided to purchase a cellular phone, but she...
 algebra  solve this word problem. a bank offers two accounts. Their local plan ...
 Math  Compound Inequalities  A car rental agency charges A. $60 per day or B...
 algebra 2  A rental car agency charges $13 per day plus 12 cents per mile to ...
 ALGEBRA  Company A charges $55 per day plus $0.35 per mile to rent a car. ...
More Related Questions