Monday

December 22, 2014

December 22, 2014

Posted by **Ak** on Tuesday, November 3, 2009 at 12:43am.

- Math, not "12" -
**Writeacher**, Tuesday, November 3, 2009 at 4:46amAssistance needed.

Please type your__subject__in the**School Subject**box. Any other words are likely to delay responses from a teacher who knows that subject well.

- 12 -
**Reiny**, Tuesday, November 3, 2009 at 7:50amLet the number of $2 increases be n

Now:

number of rooms = 210

cost per room = 45

cost of cleaning= 210(5)

After increase:

number of rooms = 210 - 3n

cost per room = 45 + 2n

cost of cleaning = 5(210-3n)

profits = (210-3n)(45+2n) - 5(210-3n)

= ...

expand the above, then express as a simplified quadratic.

If you know Calculus, differentiate and set equal to zero to solve for n

If you are doing these by completing the square, do so.

**Answer this Question**

**Related Questions**

math - Help pleaseeee The Hotel Regal has 500 rooms. Currently the hotel is ...

math - Help please >.< The Hotel Lakewell has 450 rooms. Currently the ...

math - a hotel chain charges $120 per room and rents an avg of 40 rooms per ...

math - a hotel chain charges $120 per room and rents an avg of 40 rooms per ...

math - Two restaurants have rooms to rent for dinner parties. One restaurant ...

math - miss Thao owns a small hotel with 30 identical rooms. she finds that if ...

math - a room at the hamilton inn costs 104 dollars per night for two people ...

Math 1200 - a complex has 205 apartment units. When the rent is $635 per month ...

Calculus - The manager of a 100 unit apartment complex knows from experience ...

Pre-Calculus - The Hotel Bellville has 400 rooms. Currently the hotel is filled...