Kendra photographed the Dogs-n-Suds annual car wash. She photographed 20 dogs and owners in all. If there was a total of 64 legs, how many dogs and owners are there?
1
Expert's answer
2011-05-12T11:28:07-0400
Assume that every owner has 2 legs, each dog has 4 legs. Let X be the total number of owners and Y be the total number of dogs. Then & X+ Y = 20 On the other hand the total number of legs is equal to 4 X + 2 Y = 64
We have to resolve this system of equations: X+ Y = 20 4 X + 2 Y = 64
From the first equation: & X=20-Y Substituting to the second one we get: 4(20-Y)+2Y = 64 80 – 4Y + 2Y = 64 2Y = 24 Y=12, Whence X=20-12=8
Numbers and figures are an essential part of our world, necessary for almost everything we do every day. As important…
APPROVED BY CLIENTS
"assignmentexpert.com" is professional group of people in Math subjects! They did assignments in very high level of mathematical modelling in the best quality. Thanks a lot
Comments
Leave a comment