Farmer doug has some pigs and chickens. one day he counted 24 legs and 7 heads in the barnyard. how many of each animal did farmer doug count?

Farmer Doug counts 2 chickens and 5 pigs.

Step-by-step explanation:

Let x be the number of chickens and y be the number of pigs.

Since a chicken has 2 legs and a pig has 4 legs

According to the question , we have two equations :-

Divide 2 on both sides in equation (2), we get

Now, Subtract equation (1) from (3), we get

Put y=5 in (1) , we get

Hence, Farmer Doug counts 2 chickens and 5 pigs.

the answer   is 200

step-by-step explanation:

this is a problem about poisson probabilities.   i don't know if you've

already studied poisson distributions, or if you have a place to look

to read more about the subject.  

here's how you can see a poisson distribution coming.   when there are

a lot of events that may happen at any time (or any place), and when

you're counting how many of them happen at a particular time (or a

particular place), and each event is independent of the others, then

the result is a poisson distribution.   this is roughly true for the

chocolate chips; one chip being in a cookie has only a small effect on

the probability that another chip will be in the cookie.

once you know you have a poisson distribution, you know a lot.   there

is only one parameter to a poisson distribution, so if you know the

mean, you know everything.   the form of the distribution is

  probability of n chips = {[e^(-x)]*(x^n)} / (n! )

so a parallelogram is just like a square base times height. multiply 40 and 39 to get 1560 inches.

a triangle is base times height divided by two. so multiply 7.9 and 5 and then divide it by 2 to get 19.75inches.

the kite can be split into two separate triangles and added together to get the total area. 30 x 4 /2 which equals 60. make sure to double it for the two triangles making 120.