This is probably basic but I cant get my head around it d^2 y dy ---- +5 -- +6y = te^(-2t) dt^2 dt Solve using complementary function/particular integral approach. Use substitution y = z(t)e^(-2t) to simplify the equation. Integrate the resulting equation once with respect to t. The final first order equation for z may be solved using the CF/PI approach. Any help would be massively appreciated.
Caine | (209.244.66.196) | Friday, 7 February 2003 12:35:54 PM
Someone Please help me figure out this simple math problem
Three guys are hunting and get a hotel room for the night. It costs them
10 dollars a peice a night. The bell boy decides he charged them too much and gives them five dollars (each 1 dollar) back but keeps 2 for a tip for himself.
$10 $10 $10 paid = $30
$1 $1 $1 got back = -$3
------------------- ----
$9 $9 $9 have now = $27 *$9x3people=$27
$2 for bell boy = +$2
----
$30-$3=$27 $27+$2=$29 $29
Where did the extra dollar go?
German Boy | (65.95.164.106) | Thursday, 6 March 2003 2:17:03 PM
This is a very simple problem to solve but has baffled many people. It has been shown to PhD Math professors who have been stumped. However, when i showed it to my 10 year old sister she picked the problem out right away and solved it. I will not tell u the answer but i will give u a major clue. When adding and subtracting and multiplying together, never forget BEDMASS. Remember adding comes first then subtraction. Good LUCK
Ben | (81.6.225.47) | Thursday, 13 March 2003 7:12:28 PM
A sub goes down to the deapth of 2069 metes and goes up 1785 metres how deep is he going to be in th sea?
gravimetricstoichiometry | (161.184.204.75) | Sunday, 30 March 2003 5:37:02 AM
Ben... your problem is impossible. Where does the sub start? Is it in the water, our out? At the surface or already in a depth? Insufficient data. What direction is up in the ocean?
olga | (207.200.171.4) | Thursday, 15 May 2003 10:27:49 PM
-52=-52+k
olga | (207.200.171.4) | Thursday, 15 May 2003 10:28:11 PM
-52=-52+k
olga | (207.200.171.4) | Thursday, 15 May 2003 10:28:27 PM
-52=-52+k
olga | (207.200.171.4) | Thursday, 15 May 2003 10:28:42 PM
-52=-52+k
olga | (207.200.171.4) | Thursday, 15 May 2003 10:28:58 PM
-52=-52+k
olga | (207.200.171.4) | Thursday, 15 May 2003 10:29:14 PM
-52=-52+k
Jonathan | (152.163.252.228) | Monday, 4 August 2003 6:28:21 AM
Caine:
He charged them five dollars too much so the rooms were 25 dollars($8.33 each). So he owed them each $1.67. He gave them each $1 but took 67 cents from each of them as tip(67 cents * 3 = $2). The net result is that he took $1 from each of the 3 hunters and kept $2 as tips $30 - ($3 + $2) = $25, which is the total cost of the 3 rooms.
nicola | (81.187.207.194) | Tuesday, 23 September 2003 8:47:59 PM
how can i get 5,2,4 and 9 to equal 52. You can only use the numbers once each and you can use +-* or/ any help?
nicola | (81.187.207.194) | Tuesday, 23 September 2003 8:48:50 PM
how can i get 5,2,4 and 9 to equal 52. You can only use the numbers once each and you can use +-* or/ any help?
sam | (152.163.100.8) | Tuesday, 19 October 2004 8:13:47 AM
i am only a 7th grader. iam notas smart as u ...to confuseing