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Arrays |
2014-01-18 |
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Yesenia pose la question :
Ray makes an array that has four rows of four counters. He wants to make two more arrays using the same number of counters. He wants more than one counter in each row. What two arrays can he make?
Penny Nom lui répond. |
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Mark's books |
2014-01-18 |
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Jason pose la question :
Mark has 312 books in his bookcases he has 11 times as many fiction books as nonfiction books how many fiction books does mark have?
26
212
286
301
Penny Nom lui répond. |
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The ratio of two shares |
2014-01-17 |
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Kenneth pose la question :
Hello:
Two people share $100.00 as follows: $25.00 and $75.00.
The two share the $100.00 in a ratio of 1 to 3.
I want to think that the two people share the $100.00 in a ratio of 1 to 4.
Can you explain why 1 to 3 is correct and 1 to 4 is not?
I thank you for your reply.
Penny Nom lui répond. |
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A rectangular shaped property |
2014-01-17 |
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Donna pose la question :
If I I have property that is rectangle shaped. I I know the ends are 100 feet how many feet would the sides be to make 5.4 acres
Penny Nom lui répond. |
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An inequality |
2014-01-17 |
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Rosie pose la question :
4x/x-2<3
four x divided by x-2 is less than or equal to 3
Penny Nom lui répond. |
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$9.50 in coins |
2014-01-15 |
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dana pose la question :
you have $9.50 in coins. it has twice as many nickels as quarters and three times as many dimes as nickels. how many of each coin do you have?
Penny Nom lui répond. |
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Five cubes |
2014-01-15 |
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Bob pose la question :
Rick has five cubes. When he arranges them from smallest to largest, the difference between the heights of any two neighbouring cubes is 2 cm. The largest cube is as high as a tower built from the two smallest cubes. How high is a tower built from all five cubes?
Penny Nom lui répond. |
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Watching a bouncing ball through a window |
2014-01-15 |
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Bob pose la question :
A ball falls from the roof, at a height of 10m. After each impact on the ground it bounces back up to 4/5 of its previous height. How many times will the ball appear in front of a rectangular window whose bottom edge is at a height of 5m, and whose top edge at a height of 6m?
Penny Nom lui répond. |
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Is this operation associative? |
2014-01-14 |
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patrick pose la question :
Associative test: Can you explain the following to me?
Is the following operation associative?: x*y=x+y+1
1) x*(y*z)=x*(y+z+1)=x+(y+z+1)+1=x+y+z+2
2) (x*y)*z=(x+y+1)*z=(x+y+1)+z+1=x+y+z+2
The answer is yes as 1) = 2)
My specific questions are:
1) How x*(y*z)=x*(y+z+1)=x+(y+z+1)+1 ?
2) How (x+y+1)*z=(x+y+1)+z+1?
Thank you!!
Penny Nom lui répond. |
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A 7% solution |
2014-01-14 |
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imran pose la question :
what amount of H2SO4 should be added to make 5mL of 0.7% H2SO4 solution
Penny Nom lui répond. |
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Fractions and exponents |
2014-01-11 |
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john pose la question :
what is the exponent form of 9^4/7^-2 and 6^-3/10^-5
Penny Nom lui répond. |
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The train fares are proportional to the square root of distance traveled |
2014-01-11 |
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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. |
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On what day of the week was July 4, 1904? |
2014-01-11 |
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Madi pose la question :
Hi guys,
I have a question. July 4, 1903, was a Tuesday. On what day of the
week was July 4, 1904? If you could give me an equation that would
work for any question like this, that would be GREAT!
Your fellow math scholar (in training),
Madi
Penny Nom lui répond. |
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A rectangle inscribed in a circle |
2014-01-10 |
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Marian pose la question :
A 16 cm by 12 cm rectangle is inscribed in a circle. Find the radius of the circle.
Penny Nom lui répond. |
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4x^3-7x^2-2x |
2014-01-10 |
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Alvi pose la question :
4x^3-7x^2-2x
Penny Nom lui répond. |
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