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proportional

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The price of a watermelon 2018-07-07
errin pose la question :
the price of the watermelon is directly proportional to its weight. If a watermelon that weighs 22 pounds cost $5.40, how much will a 17.5 pound watermelon cost?
Penny Nom lui répond.
The train fares are proportional to the square root of distance traveled 2014-01-11
manish pose la question :
train fares are proportional to the sq .root of distance traveled. the train fare is Rs. 24.4 for a distance of 140 kms. by how much % does the total fare increase if the same distance is covered by breaking the journey after every 35 kms.
Penny Nom lui répond.
A silver figurine 2013-05-03
Renee pose la question :
I have a silver figurine, the density of silver is 10.5g/cm3. if the figurine weighed 149 g. to determine the volume, he dropped it into a cylindrical glas of water. the diameter of the glass is 6 cm and the figurine was pure silver, by how much should the water level in the glass rise?
Penny Nom lui répond.
If 4 cooks can bake 8 pies in 6 hours????? 2013-03-18
Kenneth pose la question :
Hello:

I want to determine which quantities are directly and inversely proportional in order to determine the answer for the following:.

If 4 cooks can bake 8 pies in 6 hours, 2 cooks can bake how many pies in 4 hours?

Answer: 2 2/3 pies

Can someone fully explain what I need to know in order to determine what is directly and inversely proportional in the example above?

I thank you for your reply.

Robert Dawson lui répond.
Sharing the profit 2012-05-14
Mafiza pose la question :
A and B started a business by investing $6000 and $8000 respectively. At the end of the year, a profit of $2100 is made. How much amount will A get as his share of profit?
Penny Nom lui répond.
The length is inversely proportional to the width 2012-03-18
David pose la question :
For a given set of rectangles, the length is inversely proportional to the width. In one of these rectangles, the length is12 and the width is 6. For this set of rectangles, calculate the width of a rectangle whose length is 9
Penny Nom lui répond.
If x ix directly proportional to y then ... 2012-02-19
Crystal pose la question :
I understand that we say x and y are proportional, then y = kx.
Generally when we say x is proportional to y, we think that when x increases y increases.
Now I am questioning whether that is actually true.
If k is negative, then when x increases, y DECREASES.
My question is does this mean this statement is incorrect:
If x is proportional to y, when x increases, y increases proportionally.
Is it more correct to say:
If x is proportional to y, when x increases, y either increases proportionally or decreases proportionally.
Along the same line of reasoning, when x is inversely proportional to y, we think that when x increases y decreases, but that is true only if k is positive.
Is that correct?

Harley Weston lui répond.
Proportionality 2010-02-27
Nazrul pose la question :
If a is proportional to b then how can I prove that (a^2-b^2) is proportional to ab. Please show me the process in details.
ms. Dame and Tyler Wood lui répond.
Proportionality 2009-11-03
Nazrul pose la question :
If x is proportional to y , how can I prove that (x^2-y^2) is proportional to xy. Please explain the process.
Penny Nom lui répond.
Proportionality 2009-06-29
Nazrul pose la question :
If x is proportional to y and y is proportional to z , how can I prove that (x^2+y^2)^3/2 is proportional to z^3
Harley Weston lui répond.
Direct, inverse and indirect proportionality 2009-03-04
Brian pose la question :
My 14 year old is confused about indirectly proportional and inversely proportional. On searching on the internet we were directed to: http://mathcentral.uregina.ca/QQ/database/QQ.09.00/ellis1.html Here leanne starts explaining indirectly proportional and ends up describing inversely proportional. Has Leanne got it wrong ?
What is indirectly proportional.

Thanks
Brian

Chris Fisher lui répond.
Similar Triangles Given a Median 2008-08-17
RAM pose la question :
Sides AB , AC and median AD of a triangle ABC are respectively proportional to PQ PR and median PM of another triangle PQR. Show that ABC is similar to PQR
Janice Cotcher lui répond.
Arithmetic means and geometric means 2007-04-04
Dani pose la question :
Hi! I was just wondering why the arithmetic mean of sets of numbers is larger than the mean proportional of the same numbers? Thanks! Dani
Haley Ess lui répond.
Ratio and proportion 2001-10-10
Steve pose la question :
Where would you use a proportion and/or a ratio in a real life job or problem.
Leeanne Boehm and Walter Whiteley lui répond.
Proportionality: direct and indirect 2001-01-18
Nancy Ellis pose la question :
What is the difference between directly proportional and indirectly proportional?
Leeanne Boehm lui répond.
 
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