Saturday

February 28, 2015

February 28, 2015

Posted by **Anonymous** on Sunday, March 25, 2012 at 5:53pm.

- algebra -
**Reiny**, Sunday, March 25, 2012 at 6:15pmYour rate = room/8

friends rate = room/x

combined rate = room/8 + room/x

= room(x+8)/(8x)

then

5 = room / [room(x+8)/(8x)]

5 = 8x/(x+8)

8x = 5x + 40

3x = 40

x = 40/3 = 13 1/3

friend alone could do it in 13 hours and 20 minutes

**Answer this Question**

**Related Questions**

algebra 2/trig - Tina can paint a room in 8 hours, but when she and her friend ...

algebra2/trig - tina can paint a room in 8 hours, but when she and her friend ...

Intermediate Algebra - Joe can paint a room in 6 hours while Sue can paint the ...

Algebra - If Dale can paint a room in 5 hours alone and Chip can paint the same ...

Math - Al can paint a room in a hours working alone. Bill can paint a room in b ...

math - If painter A can paint a room in three hours by themselves, and painter B...

math - A can paint a room in 3 hours, and B can paint a room in 4 hours. How ...

math - Arthur can paint a room in 6 hours. Boris can paint the same room in 8 ...

math - Shelby can paint a room in 4 hours. Zoe can paint the same room in 7 ...

math - If jen can paint a room in 7 hours and jen and keith can paint the room ...