how do you do this algebra problem on work? - XP Math - Forums

 XP Math - Forums how do you do this algebra problem on work?
 User Name Remember Me? Password
 Register Arcade Members List Mark Forums Read

 Thread Tools Display Modes
 07-27-2007 #1 phattylovesphood. Guest   Posts: n/a how do you do this algebra problem on work? person A puts up wallpaper in the bedrooms of a house in 3 hrs. person B can do the same job in 4 hrs, and person C can do the same job in 12 hrs. if all three of them work together, how many minutes will it take them to put up the wallapaper?
 07-27-2007 #2 Poetland Guest   Posts: n/a notethese are easy to set upIn one hourA wallpapers 1/3 of the houseB wallpapers 1/4 of the house, andC wallpapers 1/12 of the houseif x = the number of hours to wallpaper one house, then1/3 x + 1/4 x + 1/12 x = 1multiply each term by the LCD = 124x + 3x + x = 12combine like terms8x = 12x = 12/8 = 3/2 = 1.5 hours = 90 minutes
 07-27-2007 #3 RabO Guest   Posts: n/a A took: 180 minutesB took: 240 minutesC took: 720 minutesso the average time they take is : (180 + 240 + 720) / 3 = 380 minutes
 07-27-2007 #4 praman* Guest   Posts: n/a =(3+4+12)/3=19/3

 Thread Tools Display Modes Linear Mode

 Posting Rules You may not post new threads You may not post replies You may not post attachments You may not edit your posts BB code is On Smilies are On [IMG] code is On HTML code is Off Forum Rules
 Forum Jump User Control Panel Private Messages Subscriptions Who's Online Search Forums Forums Home Welcome     XP Math News     Off-Topic Discussion Mathematics     XP Math Games Worksheets     Homework Help     Problems Library     Math Challenges

All times are GMT -4. The time now is 12:50 AM.

 Contact Us - XP Math - Forums - Archive - Privacy Statement - Top