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07062009  #1 
Join Date: Jul 2009
Posts: 5

Please Help me
hello i am new at this site, so i am hoping i can get help b4 this evenings class.
i have a problem i am not able to correctly solve. it goes like this Find 3 consecutive even integers such that 15 times the largest is 136 more than 4 times the sum of the smaller ones. can you please show me the work so that i can compare it to what i did thank you Theresa 
07082009  #2  
Join Date: Dec 2008
Posts: 249

Quote:
Hope this does not come too late to help you. Three consecutive even integers can be represented by n, n + 2, and n + 4. 15 x (n + 4) = 136 + 4 x (n + n + 2) 15n + 60 = 136 + 4 x (2n + 2) 15n + 60 = 136 + 8n + 8 15n + 60 = 8n + 144 15n  8n = 144  60 7n = 84 n = 12 So the three consecutive even integers are 12, 14, and 16. To check: 15 x 16 = 136 + 4 x (12 + 14) 240 = 136 + 4 x 26 240 = 136 + 104 240 = 240 

07132009  #3  
Join Date: Jul 2009
Posts: 5

thank you, I finally figured it out, it took all day to do so, but i did it,
Quote:
Last 

07132009  #4 
Join Date: Jul 2009
Posts: 5

Thank you
I hope you get this post, the problem i had done taken me a very long time to do but i did it and i got it correct, i am hoping to come back on later and get help with graphing, i am struggling with that one too much too fast,
Thanks again Last 
09092009  #5  
Join Date: Sep 2009
Posts: 2

sorry
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10062009  #6  
Join Date: Jul 2009
Posts: 5

fractinal equations HELP !!!!!!!!!!!!!!!!!
mr Hui,,,,, Are you available to help me understand some algebraic factoring please,, Example 3 over 2x + 2 + 4 over x + 1 = 11/12
Quote:


10072009  #7  
Join Date: Dec 2008
Posts: 249

Quote:
3/(2x + 2) + 4/(x + 1) = 11/12 Then we can say 3/(2(x + 1)) + 4/(x + 1) = 11/12 3/(2(x + 1)) + 8/(2(x + 1)) = 11/12 (3 + 8)/(2(x + 1)) = 11/12 11/(2(x + 1) = 11/12 2(x + 1) = 12 x + 1 = 6 x = 5 

01282010  #8 
Join Date: Jan 2010
Posts: 1

hello iim jessie27 can you help me with probability of independent events please

01312010  #9 
Join Date: Mar 2005
Posts: 10,647

Two events A and B are independent if the occurrence of one does not affect the probability of the occurrence of the other. For instance, the event of obtaining a head on the up face when a fair coin is tossed and the event of obtaining a five on the up face when a fair die is rolled are independent.
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02162010  #10 
Join Date: Sep 2008
Posts: 37

for jessie27
Also If the outcome of those effects do not effect eachother in any shape or form, for example the outcome of flipping heads or rolling a six have nothing to do with eachother depending on the problem therefore making them independent of eachother.

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