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A Squared Number That's Negative |
2010-09-22 |
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From David:
What is the only number that when it's squared becomes negative?
Answered by Stephen La Rocque. |
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COMPASS BEARING |
2010-09-22 |
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From Vivinne:
Three boys, Isaac, Alex and Ken are standing in different parts of a football
field.Isaac is standing 100m North of Alex. Ken is 120m East of Alex. Find
the compass bearing of Ken from Isaac.
Answered by Stephen La Rocque. |
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Limiting Cases in Geometry |
2010-09-22 |
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From Niki:
Consider a rectangle inscribed in a circle with a radius or R. What are the possible perimeters for the rectangle?
Answered by Stephen La Rocque. |
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|x+ 3| = |x-1| |
2010-09-21 |
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From Jack:
|x+ 3| = |x-1|
Answered by Penny Nom. |
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What is the average speed? |
2010-09-21 |
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From Cindy:
A boat travels downstream m nautical miles at d knots. It travels upstream m nautical miles at u knots. What is the average speed for the entire trip?
Answered by Penny Nom. |
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Limits |
2010-09-20 |
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From rodrigo:
what's the limit of x+1/x-1, when x tends to 1?
Answered by Janice Cotcher. |
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Find the point of contact of the circles |
2010-09-20 |
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From Sandra:
If the center of circle A = (-1,-3) and the radius of it is √20,
the center of circle B = (5,9) and the radius of it is √80.
Find the point of contact of the circles A and B.
Answered by Janice Cotcher. |
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40 mph for 6 minutes |
2010-09-20 |
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From Andy:
If i was traveling at 40 mph for 6 minutes, what is my distance in miles?
Answered by Penny Nom. |
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order fractions from least to greatest |
2010-09-20 |
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From Kameron:
How do I work this out to find the answer from least to greatest ? 48/8, 12/16, 3/5
Answered by Melanie Tryer. |
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Constructing a tipi |
2010-09-20 |
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From mike:
we are thinking about making a lightweight tipi tent but we need to know what the angles and lengths of each side that we will need to cut. The height of the tipi wants to be about 2.2m span at the widest point wants to be about 3.2m we want to make it based upon a 6 sided(hexagon) shape thanks for your help
Answered by Harley Weston. |
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May Lee's cake |
2010-09-18 |
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From Wafa:
May Lee bought a cake which is circular in shape. Her sister ate a quarter of the cake. Given that the area of the top surface of the remaining portion is 520 square cm, find the diameter of the cake.
Answered by Penny Nom. |
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Elimination and substitution |
2010-09-18 |
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From Lauren:
Solve one using the method of substitution and the other with the method of elimination.
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a. y=5x+4
x=2y+1
b. 4x+3y=7
6x-3y=13
Answered by Penny Nom. |
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The circle centered at (2,-4) with radius 3 |
2010-09-18 |
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From lupe:
Consider the circle centered at (2,-4) with radius 3. Write the equation
of this circle sketch its graph, and find the exact coordinates of its intercepts.
x-intercept
y-intercept using the quadratic equation?
Answered by Penny Nom. |
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Continuity |
2010-09-18 |
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From Carina:
Hi. My name's Carina and I'm currently a sophomore in high school.
I'm having a lot of difficulties in AP Calculus with continuity,
one-sided limits, and removable discontinuities. Basically, I have no
idea how to do them or even what they are. I read the lesson but I
still don't get it. Can someone put it in simpler terms so I can
understand how to complete my questions? Thank you!
Answered by Robert Dawson. |
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Six nines |
2010-09-16 |
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From Steph:
It's sort of one question. We have to use six nines to get the numbers 1-30. I got all but 22, 23, 24, and 30. Like 15 is 9+9-(9+9+9)/9.
Answered by Penny Nom. |
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