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Free answers to math word problems

Asked Feb 19, 2010, 06:41 PM — 16 Answers
You are trying to decide from what company to buy your next 5-year supply of light bulbs. Would you look to the company whose light bulbs have the greatest mean or greatest median life?

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16 Answers
ROLCAM's Avatar
ROLCAM Posts: 1,437, Reputation: 250
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#2

Feb 20, 2010, 01:54 AM
1) Mean - having a value intermediate between the values of other quantities.
Ex. A mean diameter.
2) Median - the middle number of a series. If the sequence has an even number of values, the median is the average of the two middle values. (Examples the median of 1, 3, 4, 8, 9 is 4. The median of 1, 3, 4, 8, 9, 10 is 6.
One cannot answer your question
Based only on the above definitions.
You would need to have more information about the company.
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HeatherG's Avatar
HeatherG Posts: 2, Reputation: 10
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#3

Jun 3, 2010, 10:04 PM
How many quarts of pure antifreeze must be added to 9 quarts of a 10% antifreeze solution to obtain a 20% antifreeze solution?
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bushman11's Avatar
bushman11 Posts: 1, Reputation: 10
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#4

Jun 29, 2010, 06:55 AM
At maximum speed an airplane travels 2460 miles against the wind in 6 hours. Flying with the wind the plane can travel the same distance in 5 hours. What is the speed of plane with no wind?
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cgmadi45's Avatar
cgmadi45 Posts: 1, Reputation: 10
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#5

Dec 2, 2010, 04:46 PM
Timmy has 180 marbles, some plain and some colored IF there are 32 more plain marbles than colored marbles, how many colored marbles does he have?
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Unknown008's Avatar
Unknown008 Posts: 8,147, Reputation: 3745
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#6

Dec 2, 2010, 11:12 PM
Let x be the number of coloured marbles.

Then, the number of plain marbles is x + 32.

The sum of those two gives 180, that is:

X + (x + 32) = 180

Find x.

And next time, start your own thread instead of piggybacking another one. Thank you!
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tcarthans's Avatar
tcarthans Posts: 1, Reputation: 10
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#7

Jun 21, 2011, 04:55 PM
There are 110 calories 28.4 grams of cereal x. Find how many calories are in 45.44 grams of this cereal.
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Unknown008's Avatar
Unknown008 Posts: 8,147, Reputation: 3745
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#8

Jun 21, 2011, 10:33 PM
What have you tried tcarthans?
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cpalmer's Avatar
cpalmer Posts: 1, Reputation: 10
Junior Member
  
#9

Dec 24, 2011, 09:57 AM
A company is planning to manufacture mountain bikes.The fixed monthly cost will be $200,000 and it will cost $100 to produce each bicycle write the cost function,c of producing x mountain bikes per month
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pready's Avatar
pready Posts: 2,678, Reputation: 897
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#10

Dec 26, 2011, 06:14 PM
Cost = Fixed cost of $200,000 + (variable cost of $100 * number of units produced)
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