# MATH NEED HELP!

I have four questions in one.

1. A library crew can shelve books in six hours. Another crew can do the job in four hours. If the first crew begins and is joined by the second crew one hour later, how many hours will it take to finish the job?

2. Find a quadratic function f(x)=ax^2 + bx + c whose graph has a maximum value at 25 and x-intercepts -3 and 2.

3. Suppose Z varies directly as X and Y and inversely as W, and Z=8 when X=6, Y=5, and W=10. Find Z when X=3, Y=4, and W=5.

4. Find the equation of the hyberbola with foci (3, -6) and (3,2) and with 6 as the difference of focal radii.

Even if you only know one I sure would appreciate the help. :)

1. 👍 0
2. 👎 0
3. 👁 102
1. 1. 1/6+1/4x=1
1/4x=5/6
x=20/6 hrs= 3 2/6 hrs

1. 👍 0
2. 👎 0

## Similar Questions

1. ### math

A library crew can shelve books in six hours. Another crew can do the job in four hours. If the first crew begins and is joined by the second crew one hour later, how many hours will it take to finish the job?

asked by jessica on July 26, 2011
2. ### English

1. We should not scribble in books in the library. 2. We should not write down in books in the library. 3. We should not make a noise in the library. 4. We should not walk making sounds in the library. 5. We should not tear books

asked by rfvv on March 19, 2010
3. ### English

1. When is the library open? It is open from 8 a.m. to 5 p.m. 2. What time is the library open? It is open from 8 a.m. to 5 p.m. 3. What are the opening hours of the library? The opening hours are from 8 a.m. to 5 p.m. 4. What are

asked by rfvv on April 1, 2013

Solve did you use an estimate or an exact answer? 1/people donated 124 books to the library last month and 139 books this month. How many books were donated in this period? 2/The library has 387DVDs in its collection. A total of

asked by Nawaf on October 26, 2013
5. ### Math

In a school library there are 35% English books,25% maths books and the remaining 250 books are on general subjects. How many books are there in the library?

asked by Anonymous on August 23, 2017
6. ### math

MEghan had 36 books in her locker. Some were library books, text books and the rest were telephone books. THe number of library books and phone books combined equals twice the number of text books. The number of text books and

asked by maggie on September 30, 2012
7. ### maths

A library opens with a collection of 300 books. During the first week after the opening, an additional ten books are donated to the library’s collection. In each subsequent week, six more books are donated to the library’s

asked by Emma on April 21, 2016
8. ### algebra

John has 36 books in his locker. He has text books,library books, and telephone books. How many books of each kind does he have if: lib + tel= 2x text books and text + tel = 3x lib books I think it'd be easier to let T,L and B

asked by Neil on October 15, 2006