Okay this might be a easy problem, and maybe i just cant concentrate but i dont get this, its the last question to my math hw here we go....
A farmer can plow a field in d days. It takes his son 4 fewer days to the plow the same field.
a) Express in terms of d the part of the field that the farmer can plow in a day.
b) Express in terms of d the part of the field that the son can plow in a day
c) Express as a fraction in lowest terms the part of the field that the farmer and his son can plow in a day working together.
Those are the 3 questions (a,b,c), a brief explanation of how you arrived at the answer for each would be appreciated, anyways thanks for helping..
2007-12-31 09:56:50 · 3 answers · asked by Shiv3r 2 in Education & Reference ➔ Homework Help
a. The farmer can plow 1/d of the field in one day.
Think of it with numbers. If I can plow the field in 3 days, then I can plow 1/3 of it in a day.
b. The son can plow 1/(d-4) of the farm in a day. Same rationale.
c. Together, they can plow 1/d + 1/(d-4) of the field.
1/d +1/(d-4) = (d-4)/d(d-4) + d/d(d-4)
that's converting the fractions to the common denominator
(2d -4) / (d^2 -4d) is the final answer
your teacher may like 2(d-2) / d(d-4)
2007-12-31 10:18:44 · answer #1 · answered by Steve A 7 · 0⤊ 0⤋
"Lulu 40 9" is effective until eventually the final answer...there is not any logic in dividing with the help of two....if dad can do a million/10th and son then a million/6th then including at the same time and dividing with the help of two implies at the same time they do decrease than the son with the help of himself....hmm...perchance that became Lulu's logic
2016-10-02 23:52:47 · answer #2 · answered by Anonymous · 0⤊ 0⤋
who gets homework on christmas eve?
2007-12-31 10:05:28 · answer #3 · answered by Anonymous · 0⤊ 0⤋