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How many CDs and videos did the store sell? |
2010-03-01 |
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dawn pose la question : A used book store started selling CDs and videos. In the first week,the store sold 40 used CDs and videos,at 4.00
per CD and 6.00 per video.The sales for both CDs and videos totaled 180.00 she wrote a system of equations to represent the situation.Then she graph the system of equations
thanks- Dawn Tyler Wood lui répond. |
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The binomial distribution |
2010-02-27 |
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Jessica pose la question : A small mobile phone retailer has found that one of their phones has a 12% probability of being faulty and a replacement having to be provided for the customer. They have just
received a trial order for 10 phones from their biggest customer who will take their business elsewhere if 20% or more items are faulty.
i) what is the probability that they will lose their biggest customer? Penny Nom lui répond. |
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The hypotenuse |
2010-02-27 |
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Dannielle pose la question : how do you find the hypotenuse if a=8 and b=6? Penny Nom lui répond. |
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A 25 foot ladder reaches a window 20 feet high |
2010-02-27 |
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Tanner pose la question : a 25 foot ladder reaches a window 20 feet high. how far is the ladder from the building? how far must the foot of the ladder be moved to lower the top of the ladder by four feet? Tyler Wood lui répond. |
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Compound interest |
2010-02-27 |
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Allison pose la question : Have $1000.00 in saving account compound annual interest rate 6%
please calculate what it is worth 3 years, 5 years and 10 years? Tyler Wood lui répond. |
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Proportionality |
2010-02-27 |
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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. |
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Four dots are randomly placed on an 8x8 grid |
2010-02-26 |
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bobbym pose la question : Four dots are randomly placed on an 8x8 grid, compute the probability
that no row or column contains more than one dot. Claude Tardif lui répond. |
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Ordering fractions |
2010-02-26 |
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jessie pose la question : I'm having alot of trouble with orderig fractions from least to greatest! I'm in 5th grade....and my problem is, 5/8,1/2, and 3/4
I need to know HOW to order them.........can anyone give me a simple explanation? Penny Nom lui répond. |
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Ordering fractions |
2010-02-26 |
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Brianna pose la question : I'm a seventh grader and we're learning about fractions. How would you list the numbers in order from least to greatest?
The options:
A. 9/14 , 17/28 , 11/21
B. 17/28 , 9/14 , 11/21
C. 9/14 , 11/21 , 17/28
D. 11/21 , 17/28 , 9/14 Penny Nom lui répond. |
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If the earth were covered completely with water |
2010-02-25 |
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don pose la question : If the earth were covered completely with water (over Everest) how many gallons would it be?? Penny Nom lui répond. |
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Résolution d'une équation |
2010-02-25 |
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sellin pose la question : Il faut que j'exprime x en fonction de m dans l'équation suivante et je n'y arrive pas:
-3x + 1 = (m-1) / 2 * x + (2m + 3) / 5 Claude Tardif lui répond. |
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The test for some disease is 99% accurate |
2010-02-24 |
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baaba pose la question : Assume that the test for some disease is 99% accurate. If somebody tests positive for that disease, is there a 99% chance that they have the disease? Chris Fisher lui répond. |
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A linear relationship |
2010-02-24 |
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Mel pose la question : This table shows the linear relationship between an aeroplane's height (above sea level) and the outside air temperature.
h (cm) |
120 |
340 |
480 |
600 |
1040 |
T (degrees C) |
14.28 |
12.96 |
12.12 |
11.4 |
8.76 |
Find the gradient and vertical intercept of the function. Write the formula for T. Penny Nom lui répond. |
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A mixture problem |
2010-02-24 |
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Nathan pose la question : How many gallons of 60% solution must be added to 40 gallons of a 10% solution to produce a 20% solution? Penny Nom lui répond. |
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Is 0.1234567891011.... periodic? |
2010-02-23 |
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Adriana pose la question : 0.1234567891011.......Is this fraction periodic ? Penny Nom lui répond. |
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