Am having trouble with finding the equations for word problems of differential equations. Did I get these two right? Attachment 30549 If not, which one is right for the problem?

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- Mar 28th 2014, 01:04 PMcanyouhelpWord problem with differential equations?
Am having trouble with finding the equations for word problems of differential equations. Did I get these two right? Attachment 30549 If not, which one is right for the problem?

- Mar 29th 2014, 07:54 PMHallsofIvyRe: Word problem with differential equations?
If that is all you want to know, then the first is wrong, the second is right.

If you want to know**why**the first is wrong and the second right, you will need to tell us**why**you thought they were correct. - Mar 30th 2014, 07:22 AMcanyouhelpRe: Word problem with differential equations?
- Mar 31st 2014, 06:34 AMhollywoodRe: Word problem with differential equations?
I must be missing something - the first term is the interest - 0.05B/12 (monthly interest times principal). Mom puts in 240/6 = 40 a month, and Saleem takes out 50 a month, so that gives -10 for the other term. So isn't A correct?

- Hollywood - Mar 31st 2014, 07:01 AMcanyouhelpRe: Word problem with differential equations?