swimmermom3 Posted December 4, 2011 Share Posted December 4, 2011 Could someone please explain problem #13 on page 344. I understand how to get "a" and "b" and I have set "c" up using the point-slope form of the equation, but why the continuation sign (...) in the solution?:blush: Also, could some kind person explain about "d" on the same problem. I have spent all day on working ahead in math and science and I think my brain is fried. Quote Link to comment Share on other sites More sharing options...
Matryoshka Posted December 4, 2011 Share Posted December 4, 2011 (edited) Looking at the solution, it appears the continuation sign is just their rather odd way of showing that it's a repeating decimal that they're not rounding off to 0.07667 or 0.0767 or 0.077 - I've much more commonly seen this as a dot or line above the repeated number(s). (d) is just y=mx+b. You figured out the formula when you plugged the x and y values in and solved for b in © - in either one, the constant "b" ends up being 0.11. (which it doesn't if you round the slope to .07667 - which I guess is why they didn't round it). Edited December 4, 2011 by matroyshka Quote Link to comment Share on other sites More sharing options...
8filltheheart Posted December 4, 2011 Share Posted December 4, 2011 Could someone please explain problem #13 on page 344. I understand how to get "a" and "b" and I have set "c" up using the point-slope form of the equation, but why the continuation sign (...) in the solution?:blush: Also, could some kind person explain about "d" on the same problem. I have spent all day on working ahead in math and science and I think my brain is fried. the ..... is used to symbolize that the 6 is going on forever. I'm not sure why he used it in the problem though. Did you understand how the point-slope answer? If so, the cost of the box is what it would be when the box is empty or the # of ozs in the box is 0. 1.49-(18 * .076666)= .11 Does that help? Quote Link to comment Share on other sites More sharing options...
swimmermom3 Posted December 4, 2011 Author Share Posted December 4, 2011 Thank you! I couldn't for the life of me figure out what I was missing with those dots. Nothing, apparently.:tongue_smilie: And thanks so much for recommending the review link on AoPS. That has been most helpful. Quote Link to comment Share on other sites More sharing options...
swimmermom3 Posted December 4, 2011 Author Share Posted December 4, 2011 the ..... is used to symbolize that the 6 is going on forever. I'm not sure why he used it in the problem though. Did you understand how the point-slope answer? If so, the cost of the box is what it would be when the box is empty or the # of ozs in the box is 0. 1.49-(18 * .076666)= .11 Does that help? Eight, that helps a lot. I have a tendency to over-analyze and make the problems more difficult than they are. Quote Link to comment Share on other sites More sharing options...
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