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Point-slope form |
2007-08-16 |
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From jenny:
write an equation in the point-slope form and the intercept form
slope=4,passing through (1,3)
slope=8,passing through (4,-1)
slope= -5,passing through (-4,-2)
slope= -2,passing through(0,-3)
Answered by Leeanne Boehm. |
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What is 240mL of water in cups? |
2007-08-16 |
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From Gareth:
What is 240mL of water in cups?
Answered by Penny Nom. |
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How do I find out how much cubic meters will spread over meter squared area? |
2007-08-16 |
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From Derek:
How do I find out how much cubic meters will spread over meter squared area?
Answered by Penny Nom. |
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Area and perimeter |
2007-08-16 |
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From sheryl:
a 50*70 horse pen is 240 feet and 3500 square feet
a 60*60 horse pen is 240 feet and 3600 square feet
why is there a 100 square feet difference?
Answered by Penny Nom. |
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The units digit of 23^45 + 67^89 |
2007-08-16 |
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From Christopher:
What is the units digit of 23 to the 45th power plus 67 to the 89th power?
Answered by Stephen La Rocque. |
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Four digit numbers with at least one three |
2007-08-15 |
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From Alberto:
How many four-digit numbers are there which contain at least one digit 3?
Answered by Stephen La Rocque. |
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Finding the perimeter when you know the area |
2007-08-15 |
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From Lynne:
If a lot's area size is 17,642 square feet, how do I figure the perimeter?
Answered by Stephen La Rocque. |
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An octagon from a square |
2007-08-15 |
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From Dian:
Okay, here is my problem. I have a 21" square and want to make it into an octagon. I am 61 and mathematically challenged. What I need to know is how many inches to each angle? I want this to be accurate as I am using it for a pattern.
Answered by Penny Nom. |
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Percentage calculations |
2007-08-15 |
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From Lorrinn:
I process gifts for a nonprofit agency. For some gifts I calculate administrative fees. I understand calculating a straight percentage of a gift (i.e. 10% of $100.00 = $10.00). That's a fee "off the top". What I would like to better understand is the theory or the "mathematical reasoning" behind calculating percentages "on the inside". For example, to calculate 10% "on the inside" of $100.00, I use the following formula: $100.00/1.10*10.0%. The answer here is $9.09. I know how to do this, but I would like to better understand the "why". Thank you.
Answered by Penny Nom. |
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Angle of depression to a football |
2007-08-15 |
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From Tosin:
The angle of depression to a football from the top of building 10m high
is 17 degrees. Find the distance of the ball from the foot of the building.
Answered by Stephen La Rocque. |
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(x^3)-(4x^2)+(4x)=0 |
2007-08-15 |
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From Amanda:
solve.
(x^3)-(4x^2)+(4x)=0
Answered by Leeanne Boehm. |
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How many square feet are in 1.24 acres? |
2007-08-15 |
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From Karen:
how many square feet are in 1.24 acres
Answered by Penny Nom. |
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Two circles C1 and C2 meet at the points A and B |
2007-08-15 |
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From Jerry:
Two circles C1 and C2 meet at the points A and B. The tangent to C1 at A meets C2 at P. Point Q inside C1 lies on the circumference of C2. When produced, BQ meets C1 at S and PA produced at T. Prove that AS is parallel to PQ.
Answered by Chris Fisher. |
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The area and perimeter of a rectangle |
2007-08-15 |
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From Brooklyn:
Is there a way to find the perimeter of a rectangle if you have the area, or vice versa? If so, what is the equation?
Answered by Leeanne Boehm and Penny Nom. |
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Division by decimals |
2007-08-15 |
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From Brooklyn:
I am studying for an exam, and I will not be able to use a calculator. I can not figure out how to do division is the number on the outside of the box is a decimal. Ex: 2/6.3=X Can you please help me figure this out?
Answered by Penny Nom. |
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