A community for students.
Here's the question you clicked on:
 0 viewing
anonymous
 4 years ago
a/a+4=34
marian can weed a garden in 3 hrs. robinm can weed the same garden in 4 hrs. how longh will the weeding take them if they work together?
3/m1=2m/m+4 solve this equation check solution if there is no solution put no solution
Help Please!!
anonymous
 4 years ago
a/a+4=34 marian can weed a garden in 3 hrs. robinm can weed the same garden in 4 hrs. how longh will the weeding take them if they work together? 3/m1=2m/m+4 solve this equation check solution if there is no solution put no solution Help Please!!

This Question is Closed

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0dw:1330229793561:dw

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0would you move everything with an a on one side

radar
 4 years ago
Best ResponseYou've already chosen the best response.1The weeding problem is solved by just taking the product divided by the sum (3 X 4)/7=12/7 hr or 1 5/7 hour.

radar
 4 years ago
Best ResponseYou've already chosen the best response.1Multiply all terms by (a+4) getting a = 3(a+4)4 a = 3a +12 4 2a=8 a=4

radar
 4 years ago
Best ResponseYou've already chosen the best response.1To check (4)/(4+4) can't go any further as division by 0 is not permitted. Let me check my work. Are you sure you have it copied correctly?

radar
 4 years ago
Best ResponseYou've already chosen the best response.1The equation is not valid as denominator results in 0

radar
 4 years ago
Best ResponseYou've already chosen the best response.1dw:1328675059499:dwdw:1328675072118:dw The equation has 3 terms.

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0dw:1330230347158:dw

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0i get it now next problem do we multiply by m?

radar
 4 years ago
Best ResponseYou've already chosen the best response.1dessyk, have you ever heard of cross multiplying? We could do that.

radar
 4 years ago
Best ResponseYou've already chosen the best response.13(m+4)=2m(m1) 3m + 12 =2m^2 2m Yes you got now consolidate and simplify \[2m ^{2}5m12=0\]

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0then the quadratic equation?

radar
 4 years ago
Best ResponseYou've already chosen the best response.1Factor getting (m4)(2m+3) m=4 m=3/2 those are the two solutions.

radar
 4 years ago
Best ResponseYou've already chosen the best response.1Yes it is a quadratic, but a easily factored one lol

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0i see it next problem

radar
 4 years ago
Best ResponseYou've already chosen the best response.1I will leave the proof up to you.

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0dw:1330230943000:dw

radar
 4 years ago
Best ResponseYou've already chosen the best response.1Is the last term d+6 over d^24?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0we would mulktiply by d

radar
 4 years ago
Best ResponseYou've already chosen the best response.1And are you sure that the denominator of the 2nd term is 2d or is it d2 ??

radar
 4 years ago
Best ResponseYou've already chosen the best response.1O.K First I am going to change the 2nd terms appearance, but not its value by multiplying it by 1 and again by1 (which is 1) so the equation will now look like this:dw:1328676105960:dw

radar
 4 years ago
Best ResponseYou've already chosen the best response.1Note that (d^24) is (d+2)(d2) Now multiply all terms by (d^24) getting \[d ^{2}2d +2d+4 = d\]No tricks here everything legal lol

radar
 4 years ago
Best ResponseYou've already chosen the best response.1Simply: \[d ^{2}2d+2d+4=d+6 \]ooops I made a mistake I dropped of that 6 so it is now.

radar
 4 years ago
Best ResponseYou've already chosen the best response.1\[d ^{2}d2=0\]can be factored (d2)(d+1) d=2 d=1 Proof left up to you.

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0two pipes fill a storage tank in 9 hrs. the larger pipe fills the tank 3 times as fast as the smaller one . How long would it take the larger pipe to fill the tank alone?

radar
 4 years ago
Best ResponseYou've already chosen the best response.1d=2 is not a valid solution as it would result in zero in the second term,so d=1

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0next problem and last

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0two pipes fill a storage tank in 9 hrs. the larger pipe fills the tank 3 times as fast as the smaller one . How long would it take the larger pipe to fill the tank alone?

radar
 4 years ago
Best ResponseYou've already chosen the best response.1First you know the larger pipe will fill it quicker than the smaller one. let x time to fill with larger pipe then 3x is the time to fill with smaller pipe. Use product over sum to solve this type problem especially when you only have two things working. 3x * x =3x^2 3x + x =4x product over sum is:\[3x ^{2}\over4x\] and this equals 9 (given) solve by cross multiplying: 36x=3x^2 or \[3x ^{2}36x=0\]factoring getting: 3x(x12)=0 x=12 large pipe will fill it in 12 hours, small pipe will take 36 hours,together 9 hours.

radar
 4 years ago
Best ResponseYou've already chosen the best response.1Thats all for me tonight. Be sure and double check answers by proofing.

radar
 4 years ago
Best ResponseYou've already chosen the best response.1That way if I goofed you will be able to correct my mistake.

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0thnk u sooooo much youve really helped meee

radar
 4 years ago
Best ResponseYou've already chosen the best response.1ur welcome, I was just looking at that last one and it would be simpler to just reduce that 3x^2/4x to 3x/4 and set that to =9 3x/4 =9 getting 3x =36, x=12 (no quadratic that way lol)

radar
 4 years ago
Best ResponseYou've already chosen the best response.1Good night and good luck in your studies.
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.