A community for students.
Here's the question you clicked on:
 0 viewing
 2 years ago
A farmer looks into the barnyard at his pigs and chickens and he counts 169 heads and 398 feet how many pigs and chickens are their?
I need an equation PLEASE
 2 years ago
A farmer looks into the barnyard at his pigs and chickens and he counts 169 heads and 398 feet how many pigs and chickens are their? I need an equation PLEASE

This Question is Closed

ash2326
 2 years ago
Best ResponseYou've already chosen the best response.0@PJohnson89 how many legs a chicken has? and a pig?

ashna
 2 years ago
Best ResponseYou've already chosen the best response.1X = Pigs Y = Chickens Total heads (assume 1 per pig and 1 per chicken) = 169 Total legs (assume 4 per pig and 2 per chicken) = 398 X + Y = 169 heads 4X + 2Y = 398 legs You now have two equations with two unknowns, ready to solve. Y = 169  X Substitute for Y 4X + 2(169  X) = 398 4X + 338  2X = 398 2X = 60 X = 30 Pigs now if you still didn't understand .. raise questions ;)

ashna
 2 years ago
Best ResponseYou've already chosen the best response.1@PJohnson89 should i be more clear ?

ashna
 2 years ago
Best ResponseYou've already chosen the best response.1okay .. let x = pigs and y = chickens got it ?

ashna
 2 years ago
Best ResponseYou've already chosen the best response.1in maths we use variables such as x and y , so that doin eqns will be easy or say we can even take for chickens = C and pigs = P if that is what you prefer :)

ashna
 2 years ago
Best ResponseYou've already chosen the best response.1okay .. now chickens = C and pigs = P

ashna
 2 years ago
Best ResponseYou've already chosen the best response.1given that p + c = 169 (head) and 4p+2c = 398 (legs) because head is one for both pig and chicken and leg for a chicken is two and for a pig 4 .. got it ?

ashna
 2 years ago
Best ResponseYou've already chosen the best response.1okay .. good now , Multiply 1st equation by 2 2 P + 2 C = 338 4 P + 2 C = 398 ( CHANGING SIGNS IN THE 2ND EQN) 2P  0 = 60 2P = 60 P = 30 SO MUCH UNDERSTOOD ?

ashna
 2 years ago
Best ResponseYou've already chosen the best response.1@PJohnson89 dealing with a problem ?

PJohnson89
 2 years ago
Best ResponseYou've already chosen the best response.0why does the sign change in the second half

ashna
 2 years ago
Best ResponseYou've already chosen the best response.1it is like that .. that is a part of math .. like let me ask you what is 2 * 3 ?

ashna
 2 years ago
Best ResponseYou've already chosen the best response.1yes .. just like that in quadratic eqns sign changes in the second eqn which is universally acceptd .. got it ?

ashna
 2 years ago
Best ResponseYou've already chosen the best response.1can you proceed now ? we have found that pig = 30 now you try doing for chickens ;)

ashna
 2 years ago
Best ResponseYou've already chosen the best response.1do for chicken .. or you want me to do that too ?

PJohnson89
 2 years ago
Best ResponseYou've already chosen the best response.0I will try it tomorrow I have to go to work in the morning
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.