 |
|
|
|
|
|
|
|
|
A proof by induction |
2006-04-09 |
|
Sharon pose la question :
prove by induction: For every n>1, show that
2 + 7 + 12 + ...+ (5n-3) = n(5n-1)/2
Penny Nom lui répond. |
|
|
|
|
|
|
Given three angles and a side |
2006-04-09 |
|
Jon pose la question :
How do you figure out the length of all sides of a scalene triangle if given the measure of all angles, and one side?
Stephen La Rocque lui répond. |
|
|
|
|
|
|
The sum of a three digit number and its three individual digits is 429 |
2006-04-08 |
|
Megan pose la question :
Gill has recently moved to a new house, which has a three- digit number. the sum of this number and its three individual digits is 429. What is the product of the three digits which make up the house number?
Chris Fisher lui répond. |
|
|
|
|
|
|
An octagon shaped soffit |
2006-04-08 |
|
Ken pose la question :
I am trying to make an octagon shaped soffit in my ceiling and need help figuring how to divide the circle on the ceiling into an octagon-
The circle is 7 foot in diameter.
Penny Nom lui répond. |
|
|
|
|
|
|
How many billions make a trillion? |
2006-04-08 |
|
Bill pose la question :
How many billions make a trillion?
Penny Nom lui répond. |
|
|
|
|
|
|
Markup |
2006-04-07 |
|
Larry pose la question :
Calculators from different manufacturers work differently. Enter 100, then plus 15%, on some calculators you'll get 115 on others return 117.65 . On any calculator, enter 100, then divide by 0.85 (point 85) and you'll get 117.65 .
I don't understand this well enough to explain to my grandson, but as a salesman, I know which one to use.
Penny Nom lui répond. |
|
|
|
|
|
|
Ordre des opérations |
2006-04-07 |
|
Chantal pose la question :
1435/5x2-364= j'aimerais savoir la reponse et que veux dire la barre /
Claude Tardif lui répond. |
|
|
|
|
|
|
Two circles |
2006-04-07 |
|
Louisa pose la question :
One circle of radius 7cm is touching another circle of radius 4cm. These circles are on a line and the problem is to find the length AB where A is the point marking the bottom of the radius of one circle and B is the point marking the bottom of the radius of the other circle.
Stephen La Rocque lui répond. |
|
|
|
|
|
|
How many people are in the race? |
2006-04-07 |
|
Marty pose la question :
You're in a race with 1/5 of the racers ahead of you and 5/6 of them behind you. How many people are in the race?
Penny Nom lui répond. |
|
|
|
|
|
|
Finding the side of a triangle |
2006-04-06 |
|
Carole pose la question :
okays, well, im having difficulty finding the side of a triangle. It is a right triangle and the information given is that the hypotonous is 24 and the angle adjacent to the 90 degree is 32. Im trying to find X, which is placed on the bottom leg of the triangle, and have no idea how to do it. can you explain to me how to get the answer, please? i'd like to know for future reference, please. thank you.
Stephen La Rocque lui répond. |
|
|
|
|
|
|
A region described by the lengths of four sides |
2006-04-06 |
|
Mark pose la question :
I have an area that is 77ft in length at the top, 83ft at the base. One side is 46ft and the other side is 20ft. What will be the square feet for this area?
Stephen La Rocque lui répond. |
|
|
|
|
|
|
Interest computed on a 360 per year basis |
2006-04-06 |
|
Sonya pose la question :
Okay, I am reading this promissory note that says interest is computed on 365/360 basis by applying the ratio of annual interest rate (24%) over a year of 360 days.
I sure do not remember anything like this in school, and am stumped.
Stephen La Rocque lui répond. |
|
|
|
|
|
|
Degrees and grads |
2006-04-06 |
|
Nazanin pose la question :
which angle if you add 15 to its degree we can find its measure by grad?
Stephen La Rocque lui répond. |
|
|
|
|
|
|
The average of monthly averages |
2006-04-06 |
|
Ray pose la question :
I have the averages of some data in percentages. the data is rather large, how can i find the average of these averages without going back to the original data? Is there a Factor or Constant that i could multiply or devide or add and get the average of these averages without resorting to the raw data.
Steve La Rocque and Harley Weston lui répond. |
|
|
|
|
|
|
x^2+2x-3 is a factor f(x)=x^4+2x^3-7x^2+ax+b |
2006-04-06 |
|
Maha pose la question :
Given that x2+2x-3 is a factor f(x)=x4+2x3-7x2+ax+b, find a and b and hence factor f(x) completely.
Penny Nom lui répond. |
|
|
