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Compatible numbers |
2007-09-05 |
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From Beth:
Estimate using compatible numbers:
2 X 3978 =
102/25 =
Answered by Stephen la Rocque. |
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A right angles triangle |
2007-09-05 |
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From Daryl:
I have a right-angled triangle. two of its sides are 12.6cm. The third/last line is missing. How can I find the length of the last line?
Answered by Stephen La Rocque and Penny Nom. |
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The area of a circle knowing only the length of a chord |
2007-09-05 |
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From James:
I need some help in the right directions with a problem. I was presented with a problem where I need to find the area of a circle knowing only the length of a chord.
the is a circle in the center of a larger circle (which the size of either could change) the only thing that matter is that the chord is 100 ft long and rests on top of the smaller circle.
Answered by Stephen la Rocque and Brennan Yaremko. |
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Making dot arrays |
2007-09-05 |
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From angela:
What do we call the numbers that cannot be arranged into 2-row arrays?
Answered by Penny Nom. |
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X^3 = 3/10 |
2007-09-05 |
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From ioana:
If we have X at power 3 that result equally with 3/10 haw much X is ??
Answered by Penny Nom. |
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Factoring a quadratic |
2007-09-04 |
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From Arlene:
Question from arlene, a student:
x^+2x-24=0
Answered by Stephen la Rocque. |
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Variable expressions - part 2 |
2007-09-04 |
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From lisa:
how do I write a variable expression for word phrase example x less than =
2 or 2 less than p
4 fewer than job please help
Answered by Penny Nom. |
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Variable expressions |
2007-09-04 |
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From Eric:
how so i write a numerical or variable expression for each quantity.
example two dozen eggs or d dozen eggs
number of quarts ub a 3 gallons
Answered by Penny Nom. |
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The first five terms |
2007-09-04 |
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From JP:
Find the first five terms of a sequence with the nth term n^2+2n+1
and 2^n.
Answered by Penny Nom. |
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Speed of sunrise |
2007-09-04 |
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From Robert:
Facing west in a car, you are watching the sun rise (through the rear view mirror). It peaks the horizon, you take off driving. How fast would you have to drive, to see it rise again?
Answered by Stephen La Rocque. |
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Combinations of 4 letters from 8 letters |
2007-09-04 |
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From Heidi:
how many different combinations of 4 letters can be made from a set of 8 letters?
Answered by Harley Weston. |
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Triangles, squares and pentagons? |
2007-09-04 |
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From Malea:
How do you find the nth term in a set of triangles, squares and pentagons?
Answered by Harley Weston. |
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Palindromes |
2007-09-04 |
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From ANJUM:
Are there palindromes in decimals and fractions?
Answered by Harley Weston. |
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Four digit combinations |
2007-09-04 |
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From Natalie:
Using The Numbers 7 4 5
How many different 4-digit combinations are possible, you can use any of the numbers twice.
Answered by Penny Nom. |
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The tangent to y = x^3 at x = 0 |
2007-09-04 |
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From Amit:
consider the equation = x^3. The equation of tangent to this curve (which is smmetrical in Ist and IVth quadrant) at (0,0) is y=0, which is x-axis.
but graphically one can visulize that x-axis intersects the curve, so how can it be the tangent to the curve. Please help.
Answered by Harley Weston. |
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