 |
|
|
|
|
|
|
|
|
Using the augmented matrix |
2008-10-17 |
|
From Karlena:
I am supposed to write the augmented matrix of the system and use the matrix method to solve the system. I must show my work algebraically
x+y+2z=30
2x+3y+2z=53
x+2y+3z=47
Answered by Harley Weston. |
|
|
|
|
|
|
A football field covered in garbage |
2008-10-17 |
|
From AMie:
a small city produces 500,000 cubic ft of garbage per week. If all of this garbage were stacked neatly (in a nice vertical pile) on a 100-yard by 60-yard football field, how high would the pile be (in feet)?
Answered by Penny Nom. |
|
|
|
|
|
|
An arithmetic series |
2008-10-17 |
|
From Laura:
In an arithmetic series 5+9+13+...+tn has a sum of 945. How many terms does the series have?
What formula do I use?
Answered by Penny Nom. |
|
|
|
|
|
|
Integration |
2008-10-17 |
|
From hazela:
integration of
x sinx cosnx
Answered by Harley Weston. |
|
|
|
|
|
|
A tangent line to f(x) = 1/(x - 1) |
2008-10-16 |
|
From Amanda:
If f(x)=1/(x-1) then what is the slope of the tangent line at x=-2?
Answered by Harley Weston. |
|
|
|
|
|
|
100,000 + 20% |
2008-10-16 |
|
From Andrew:
I have a question what 100000 + 20% =
Answered by Penny Nom. |
|
|
|
|
|
|
The area of a rug |
2008-10-16 |
|
From Natcha:
How can I convert the Carpet Roll Size to Square Meters.
I have one Roll of carpet, (Quality is 2300 g/m2; 7 pitch/in, 9 rows/in; width: 2m) with dimension 0.5 m width and 4 m length. I needed to know that quantity of that Roll in Square Meters.
Answered by Penny Nom. |
|
|
|
|
|
|
A roll of film |
2008-10-16 |
|
From John:
I need to know how to calculate the build up on a roll of film is calculated.
Example: I start with a 6" diameter core, and I start winding .005" thick film on the core, so I am adding a total of .010" to the diameter each wrap.
If I continue to do this for a total length of film of 3000 feet, what will the roll diameter be?
So what I need is the formula to perform this type of calculation.
Can you help me? I want to be able to plug the formula in a spread sheet and to be able to input a core diameter, a film thickness and a total length and get a roll diameter.
Answered by Penny Nom. |
|
|
|
|
|
|
Two planes flying in opposite directions |
2008-10-16 |
|
From samantha:
i don't understand how to do this problem.two jets leave denver at 9:00 am one flying at a speed 50 km/h greater than the other, which is traveling west. at 11:00 am the planes are 2500 km apart. find their speeds.
Answered by Penny Nom. |
|
|
|
|
|
|
What percentage is 33333 of 22222? |
2008-10-16 |
|
From b:
How do I find the percentage of 2 numbers?
What percentage is 33333 of 22222? How do I find the answer.
Answered by Penny Nom. |
|
|
|
|
|
|
The product of two numbers is 2400 |
2008-10-16 |
|
From belinda:
The product of two numbers is 2400, one number is 20 more than the other number. what are the two numbers?
Answered by Penny Nom. |
|
|
|
|
|
|
Related rates |
2008-10-16 |
|
From Gisela:
As sand leaks out of a hole in a container, it forms a conical pile whose
altitude is always the same as its radius. If the height of the pile is increasing
at a rate of 6 in/min, find the rate at which the sand is leaking out when the
altitude is 10in.
Answered by Penny Nom. |
|
|
|
|
|
|
Bags of wheat seed |
2008-10-16 |
|
From Gayle:
If you want to plant 26 seed per square foot (wheat) on one acre of land and the seed comes in 50 lb bags and there are 13,500 seed per pound (675,000) per 50 pounds, how many bags do you need to plant per acre?
Answered by Penny Nom. |
|
|
|
|
|
|
The dimensions of a rectangle |
2008-10-16 |
|
From cristine:
the area of a rectangle is 675sq.cm.
if the width is 1/3 of the length.
find the dimensions of the rectangle....
Answered by Penny Nom. |
|
|
|
|
|
|
Perpendicular lines |
2008-10-16 |
|
From Hailey:
In the xy-plane,
the line with equation 2x + y = 3
is perpendicular to the line with equation y = mx + b,
where m and b are constants.
What is the value of m?
Answered by Penny Nom. |
|
|
