Locked: How smart are thee in math? in Off Topic

ID:107300
 
Jan 19 2011, 7:28 pm (Edited on Jan 19 2011, 8:01 pm)
Inspired by Calus Corps. Problems from : Math.com


Problem One:
Melanie can paint a certain barn by herself in x days. Her helper Melissa can paint the same barn by herself in 2x days. Write a rational expression for the fraction of the barn that they complete in one day by working together. Evaluate the expression for x =5.
*Slightly modified to prevent cheaters from cheating*

Problem two:
At a well known university, 1/4 of the undergraduate students commute and 1/3 of the graduate student commute. One-tenth of the undergraduate student drive more than 40 miles daily and 1/6 graduate students drive more than 40 miles daily. If there are twice as many undergraduate students as there are graduate students then what fraction of the commuters drive more than 40 miles daily.



Can you solve these problems? [Without cheating from Math.com] If so you'll be entered in a quick BYOND membership drawing.
#1 Jan 19 2011, 7:28 pm
Nay, I suck at math.
#2 Jan 19 2011, 7:41 pm
and 1/3 of the graduate student commute. and 1/3 of the graduate students commute.
#3 Jan 19 2011, 7:57 pm
What tank?
#4 Jan 19 2011, 7:58 pm
Gas Tank.
#5 Jan 19 2011, 7:59 pm
At a glance, ...

1) (1/x + 1/2x), (3/10) in 5 days
2) You'll have to explain what you mean by "what is the number of minutes it takes to empty the tank" because I don't drive a car, but it's (2/4 + 1/3) / (2/10 + 1/6)
#6 Jan 19 2011, 8:00 pm
A little more specific? What gas tank? Each of the students tank? Some magical tank? The question talks about everything but how many miles it takes to empty a "tank" with that little information it's an impossible question.
#7 Jan 19 2011, 8:04 pm
That was part of another problem that I copied and paste sorry for that misconception
#8 Jan 19 2011, 8:10 pm
The problems should probably be replaced every time they're solved, btw. Unless I got something wrong.