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The Proof in the Pudding |
2002-04-09 |
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From A student:
The host at a party turned to a guest and said, "I have three daughters and I will tell you how old they are. The product of their ages is 72. The sum of their ages is my house number. How old is each?" The guest rushed to the door, looked at the house number, and informed the host that he needed more information. The host then added, "The oldest likes strawberry pudding." The guest then announced the ages of the three girls. What are the ages of the three daughters?
Answered by Claude Tardif. |
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Sodding the yard |
2002-04-08 |
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From Craig:
my parents want to lay sod in our back yard. the sod cost $2.00 per square foot. The size of our yard is 20x20 and 26x41
Answered by Penny Nom. |
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Area of a triangle |
2002-04-07 |
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From Puzzled:
What is the surface area of a triangle 13 ft x 13 ft x 18 ft?
Answered by Penny Nom. |
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3/4n-6=12 |
2002-04-07 |
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From Diane:
I am in 6th grade advanced math and I just started Algebra. My teacher tries to explain it to me but I just can't get it. I am having difficulty understanding it. Please HELP!!! I will type a problem, if you could answer it and show your work so i can understand it that would be great. Please explain in simple terms. here is a couple problems I am having trouble with, PROBLEM #1 3/4n-6=12
Answered by Penny Nom. |
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Composition of functions |
2002-04-06 |
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From Yvonne:
In our new text book, the following question occurs: State the domain and range of g(f(x))given that f(x) = -x2 - 4 and g(x) = sqrt(x) The range of f(x), x<=-4, is the domain of g(x). BUT, there is no solution in the Real numbers for g(f(x))= sqrt(-x2 - 4). In the solutions it says that this is not a function and therefore does not have a domain or range. Is it a relation? Is it anything?
Answered by Claude Tardif. |
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Pairs of equations |
2002-04-04 |
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From A student:
high school level
student is asking
y=4x x=-4y
x+y=5 3x+2y=20
y=x-1 3x-y=4
x+y=3 2x-3y=-9
x+5y=4
3x+15y=-1
. . .
Answered by Penny Nom. |
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Two triangles |
2002-04-03 |
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From Scott:
Consider 2 triangles: Triangle PMB and Triangle PLA. Triangle PLA is contained within Triangle PMB. Side LA is parallel to Side MB. Point L is located on Side PM. Point A is located on Side PB. If the ratio PL:LM = 5, then what is PB:PA ??
Answered by harley Weston. |
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Take It! |
2002-04-03 |
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From Bryan:
You are playing Take It! for $180,00 with a total stranger. There are 180 identical balls in a big vase. Each player in his turn, reaches into the vase and pulls out 1,5,or8 balls. These balls are discarded. The player who takes the last ball from the vase wins the $180,000. A flip of the coin determines that you will go first. Are you glad? How many will you take out on the first move, and how will you proceed to win the prize?
Answered by Claude Tardif. |
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Common fractions to decimal fractions |
2002-04-02 |
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From Natalie:
My questions are: "how can I change 23/60 into a decimal. and give my answer to 2dp."?????????? 2nd question:for each of these pairs, which is bigger?
4/7 or 36%____________
3/11or 0.29____________
14/24 or 0.57___________
Answered by Penny Nom. |
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Pascal's Triangle |
2002-04-02 |
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From Brian:
It's about (a+b)x. I remember there a triangle with numbers to remember for a faster solution. Can you please teach me?
Answered by Penny Nom. |
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If you conect all the vertices of a regular n-gon... |
2002-04-01 |
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From Murray:
If you conect all the vertices of a regular n-gon with lines you will have (n-3)(n/2) lines inside the polygon. I want to find out how many sections these lines divide the polygon into and how many intersections they have with each other.
Answered by Claude Tardif. |
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Area of an octagon |
2002-04-01 |
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From Someone:
What is the actual square footage of a 12' octagon?
Answered by Penny Nom. |
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All four eights in three consecutive hands |
2002-04-01 |
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From Blair:
What are the odds against the same person holding all four eights in three consecutive hands.
Answered by Brian Alspach. |
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Meg's biscuits |
2002-03-29 |
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From Tami:
Meg's biscuits recipe calls for 4 cups of flour for every 1.5 cups of milk. If Meg uses 6 cups of flour, how many cups of milk will she need?
Answered by Penny Nom. |
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The reciprocal of a decimal mixed number |
2002-03-29 |
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From A student:
How do I find the reciprocal of a decimal mixed number?
Answered by Penny Nom. |
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