If there are goats and people in a field, and there are 20 heads and 50 feet, how many people are there?
146112
This is a system of equations problem. With 20 heads, you know there were a grand total of 20 humans and goats, and with one head each, you can set humans to x and goats to y and get x+y=20. Then you know that there are 50 legs, and humans have two legs and goats have 4. So you can say 2x+4y=50. Then you must get one variable by itself. A way of doing this is to multiply each part of x+y=20 by 4 to get 4x+4y=80. With this new equation and the other one, you can subtract each term, therefore eliminating the y's from one equation, and you get 2x=30. You can then divide both sides by 2 to get x=15. Then to get y, substitute 15 for X back in the original x+y=20 to get 15+y=20. Then subtract 15 to get y=5. Therefore, there were 15 humans and 5 goats.
371986
The entire world plus animals\n6.5 billion people. Noobs are so high maintanence
1042190
2,649,377,941 people. just a guess.
1077917
The population of the earth is 6.25 billion. The population of the U.S. is in excess of 300,000,000. Mud people, quit breeding.
153991
46, or 23 pair.\n\nThere is no average... this is the number all people have unless they have a flaw in their genetic makeup (very rare).
627018
every person has 85,000 to 1,25,000 hairs on his head. As for as the head goes there is a lot of hair on the body.
1111245
50 + (50x3)\n50 + 150 = 200
689838
Divide 278 by four to get the number of horses, then subract that number of horses from the heads to get the number of ostriches. MAke sense? If it doesn't email me. \n\nR u sure you have the number of hooves right?????? Cause ostriches don't have hooves but there is a remainder of 2 did u mean feet? if u meant feet then...\n\nummm...\n\nOOOO i no.... 123 horses and 0 ostriches! works don't it?
445466
A bunch of people. + or -
591210
17 ducks and 13 cows\n\n60 eyes means total 30(ducks and cows because both have 2 eyes)\n\nducks have 2 legs so by calculating 17 ducks have 17*2=34 legs\n\ncows have 4 legs and 30-17=13 cows have 13*4=52\n\n52+34=86 legs
1116965
A 100 feet length would look 1/3 of a football field, or\nfeet of 50 people
729736
Let x be the longer side of the sheep pen\n      20m (side of the shed) = shorter side of the sheep pen\n      20m = the other shorter side of the pen opposite to the given\n                  above\n      (160-20) = the sum of the longer sides of the rectangular \n                  pen\n      x=(160-20)/2\n\nArea = lw\n     A = 20(160-20)/2\n     A = 20(140)/2\n     A = 20(70)\nArea = 1400 square meters
296061
the answer is (1P)\n\n*1 peta..figureof 10^15...\n\nGUD 1 SKYLARK!
751056
a)\n4.5=x/40\n180=x  miles\n\nb) 2.5=100/n\n 2.5n=100\nn=100/2.5=40 people
904769
When the teacher finds 15 out of 100 tagged giraffes, it indicates that 15% of the population have been tagged. Therefore, to find the whole population, divide the number of tagged giraffes by the proportion of tagged giraffes (divide 60 by 15%). The answer is 400 giraffes.
845263
Luken is right.\n\n\nThe answer is 20.
140772
I'm hoping to reach that number! ... I live on several acres and need more pets (goats or sheep) to keep the grass down :)