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A right triangle |
2007-12-06 |
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From Shubhomoy:
The co-ordinates of a hypotenuse are (1,3) and (-4,1). Find the equations of the perpendicular sides.
Answered by Harley Weston. |
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Plotting a function |
2007-12-06 |
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From Paula:
My son has a problem that says plot the point:
2x-3y=9
I have explained to him that there must be a function for y in order to plot that point, but he doesn't think so. The question above that one says find the function for y, and I assume we should use that function. Am I wrong? Can we plot a point without a y function.
Answered by Stephen La Rocque. |
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System of equations |
2007-12-06 |
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From Jenn:
change the equation,x-y=4 to form y=mx+b
the solution to the system of equations y=2x and y=-x+3 is
Answered by Stephen La Rocque. |
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A circle inscribed in a triangle |
2007-12-06 |
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From Linnea:
I have a tringle with a circle inscribed in it. My teacher wants me to find the radius of the circle. This is what she gave me to work with. The triangle is ABC, AB = AC = 6, and BC = 4. She also told us to use A(squared) + B(squared) = C(squared). and that there are altitudes and and incenter. I have no idea how to do this.
Answered by Harley Weston. |
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Chicken and goat feet |
2007-12-05 |
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From Kim:
Old McDonald raises goats and chickens. The animals have a total of
100 heads adn 360 feet. How many goats and how many chickens does Mr.
McDonald have?
Answered by Stephen La Rocque and Penny Nom. |
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Representing different bases |
2007-12-05 |
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From Sudhir:
What does a number subscripted to another one denote? (I know that a number superscripted to another denotes the power, but the subscript number is something I have never seen before.)
Answered by Stephen La Rocque. |
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Third side of a triangle |
2007-12-05 |
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From Sudhir:
How can we find the all positive integral values for the third side of a triangle, whose other two sides measure 15 and 20 respectively. (No other information viz. the type of triangle, area, perimeter or angles etc. is given.)
Answered by Stephen La Rocque. |
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A radius and a tangent to a circle |
2007-12-04 |
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From elizabeth:
show that the radius of a circle meets a tangent line to the circle in a 90 degree angle.
hint: start by assuming they are not perpendicular and at a contradiction.
Answered by Penny Nom. |
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A decision based on data |
2007-12-04 |
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From manny:
You have administered a standardized test of manual dexterity to two groups of 10 semi skilled workers. One of these two groups of workers will be employed by you to work in a warehouse with many fragile items. The higher the manual dexterity of a worker the less likelihood that worker will break significant inventory. Because of a unique contract you must hire all 10 employees from one of the two groups and none of the employees from the other.
You must decide which group to choose. Choose at least two measures of central tendency and at least one measure of dispersion for each group and use those to make your choice. Be sure to justify your choice with at least one page of discussion and analysis.
Answered by Penny Nom. |
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Percentage increase in profit |
2007-12-04 |
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From Dee:
If I had a certain % increase in profits for the entire year, why can't I add the profits I made for the first 1/2 of the year to the profit I made in the second 1/2 of the year to get the total year end profit percentage? Or how can I compare the increase/decrease for each 1/2 of the year to the total % increase/decrease?
Answered by Penny Nom. |
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Ramp height |
2007-12-03 |
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From Steve:
I need to find the height of a angle.
23 degree angle at 12 feet of length is how high from the ground?
Answered by Stephen La Rocque. |
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Guess and check |
2007-12-03 |
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From Marissa:
I was sent home with a guess and check work sheet. i am not sure how i am sopouse to do this.
a sleeping bag and 2 mess kits costs $37.00.A mess kit and two sleeping bags cost $56.00
what is the cost of one sleeping bag.
Answered by Stephen La Rocque. |
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How many gallons are in the tank? |
2007-12-03 |
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From bobby:
my tank holds 740 gallons and the dimensions are 8 ft tall and 4 ft diameter the wine is 3 ft 7.5 inches from the top can you figure out how many gallons are in the tank ?
Answered by Penny Nom. |
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Zip codes |
2007-12-03 |
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From Natalie:
How many 5 digits zip codes are possible if digits can be repeated?
Answered by Penny Nom. |
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Proving a quadrilateral is a rhombus |
2007-12-03 |
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From Jeanie:
How do you prove that a quadrilateral is a rhombus because the diagonals
of the quadrilateral are perpendicular and bisect each other using the 2-column
proof method?
Answered by Stephen La Rocque. |
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