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Limits as x approaches a constant |
2007-06-25 |
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From Mac:
can you please tell me what is the reason they say "denominator is a negative quantity"
in the solution 11 and "denominator is a positive quantity" solution 10 ??
If i guess correctly, for solution 10, its because of x^2 in the denominator.
Answered by Penny Nom. |
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Selling price and revenue |
2007-06-24 |
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From nick:
hello, this is my first time asking for help from this website in which by the way, i think is great for everyone. My question is as follows... the relationship between the selling price of a sleeping bag, s dollars, and the revenue at that selling price, r(s) dollars is represented by the function: r(s)= -10s^2+1500s
evaluate, interpret, and compare: a) r(29.95)
Answered by Stephen La Rocque and Penny Nom. |
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A cubic yard of gravel |
2007-06-24 |
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From Duncan:
I'm trying to figure out how much area 1 cubic yard of gravel would cover at a depth of 2 inches? I've asked around and have many different answers.
Answered by Stephen La Rocque. |
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Volume in a triangular water trough |
2007-06-24 |
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From David:
A water trough has sloping sides of length 500mm making it triangular in cross section, with vertical ends. The width at the top is 600mm and the length is 2.0 metres.
(i) Calculate the capacity of the trough, giving your answer accurate to the nearest litre.
(ii) Find out the depth of the water when the trough is half full.
Answered by Stephen La Rocque. |
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The volume of a cube |
2007-06-23 |
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From Leah:
I am having trouble finding the equation for this problem.:
What is the volume of a cube with diagonals of length 6 sqrt(3) cm?
answer: (BLANK) cm3
Answered by Penny Nom. |
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The substitution method |
2007-06-23 |
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From mary:
solve the system by the method of substitution:
-5x+2y=-15
4x-y=9
Answered by Stephen La Rocque. |
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Exponential form: x^y |
2007-06-22 |
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From Kishor:
whats the easy way to calculate X raised to Y where y is much greater than x.
Answered by Stephen La Rocque. |
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Average speeds |
2007-06-22 |
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From Dee:
A guy goes 3.1m a second for 29 seconds in a golf cart. He then walks 1.5 meters a second. How long does he have to walk to get the average speed of 2.1m a second?
Answered by Stephen La Rocque. |
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Volume of a box |
2007-06-22 |
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From ashley:
A storage bin is 18 ft long, 6 ft wide and 3 ft high. What is its volume in cubic feet?
Answered by Penny Nom. |
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Simplify |
2007-06-21 |
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From A student:
what is the answer of
3y+5/2(4y+1)+5y/2
Answered by Penny Nom. |
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All 4 digit combinations for numbers 0 through 9 |
2007-06-21 |
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From Jessica:
How can I find all 4 digit combinations for numbers 0 through 9?
Answered by Penny Nom. |
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Rewrite 2x+4y+2=3y+5 in general form |
2007-06-21 |
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From dawn:
how do you rewrite 2x+4y+2=3y+5 in general form?
Answered by Stephen La Rocque. |
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(2x + 3y)^2 = 0 |
2007-06-21 |
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From Jon:
how do i solve for x and y if (2x+3y)²=0?
Answered by Stephen La Rocque. |
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The sum of angles in a square is three hundred and sixty degrees |
2007-06-21 |
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From victor:
can you please send to me a formalize proof for the assertion that, the sum of angles in a square is three hundred and sixty degrees. i will be grateful to hear from you
Answered by Stephen La Rocque. |
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Simultaneous equations : the Elimination method |
2007-06-21 |
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From Patricia:
I need to find the value of X and Y using the Elimination method.
5/x + 3/y=4
25/x-2/y=3
Answered by Stephen La Rocque. |
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