Another Math Problem.... (WORD PROBLEM)

[MillerLite]

Supose you are starting an office-cleaning service.  You have spent $315 on equipment.  To clean an office, you spend $4 worth of supplies.  You charge $25 per office.  How many offices must you clean to break even?

[[NotD] Chaos]

so its 25-4 = 21 .. 21 devided by 315? if i am not wrong? xD dunno man.. 

[[NotD] Chicken_Lips]

yep, 15

[[NotD] Doorknob]

315 + 4n = 25n
21n = 315
n=15 offices

[[NotD] Chaos]

im so smart

[MillerLite]

so doorknob thats a linier equation?

[MillerLite]

ive got more...

4. On a canoe trip, Rita paddled upstream (against the current) at an
average speed of 2 mi/h relative to the riverbank. On the return trip
downstream (with the current), her average speed was 3 mi/h. Find
Rita’s paddling speed in still water and the speed of the river’s current.

5. Kay spends 250 min/wk exercising. Her ratio of time spent on aerobics
to time spent on weight training is 3 to 2. How many minutes per week
does she spend on aerobics? How many minutes per week does she
spend on weight training?

[[NotD] Doorknob]

im so smart

actually your not =P
you spelled divided wrong, and you said you divide 21 by 315, but you actually divide 315 by 21.
BAHAHA...but dont worry, we still love you. 


and i dunno if thats linear...learned that stuff a long time ago

[[NotD] Chaos]

im so smart

actually your not =P
you spelled divided wrong, and you said you divide 21 by 315, but you actually divide 315 by 21.
BAHAHA...but dont worry, we still love you. 


and i dunno if thats linear...learned that stuff a long time ago

dude.. im from denmark man .. i just moved to the US ½ a year ago.. DOnt blame my grammar   and either ways doorknob..
- do dat stanky leg!

[shadowofdeath]

I know haji's that can get grammar right O_O

[[NotD]_Cobra]

Okay first of all. I can't do math. The only math that I can do is Add and Subtract and I am also 18 and that is all I can do. Dammit I am a Dumbass!

[[NotD] Chaos]

Okay first of all. I can't do math. The only math that I can do is Add and Subtract and I am also 18 and that is all I can do. Dammit I am a Dumbass!

 dont be too harsh on urself!

[[NotD] Solid Snake]

4. On a canoe trip, Rita paddled upstream (against the current) at an
average speed of 2 mi/h relative to the riverbank. On the return trip
downstream (with the current), her average speed was 3 mi/h. Find
Rita’s paddling speed in still water and the speed of the river’s current.

5. Kay spends 250 min/wk exercising. Her ratio of time spent on aerobics
to time spent on weight training is 3 to 2. How many minutes per week
does she spend on aerobics? How many minutes per week does she
spend on weight training?

4 i dont get cause it been awhile since i done these but 5 is simple 3n+ 2n =250
so the answer is 150 on aerobics and 100 on weight training

[[NotD] Chicken_Lips]

im so smart

actually your not =P

thats not very nice haha

[[NotD] Chaos]

im so smart

actually your not =P

thats not very nice haha

 i agree :p i am smart .. sometimes