# math

the trainers took a count of the animals at the zoo. there are both birds and four legged mammals at the zoo. the trainers counted 550 feet and 155 animals on their first trip through. How many birds and mammals are there?

1. 👍 0
2. 👎 0
3. 👁 452
1. x=number of 2 legged birds
y=number of 4 legged mammals
2x+4y=550

if there are a total of 155 animals and you know the number of 2 legged birds, you could subtract the two and find the number of 4 legged mammals
therefore, let y=155-x

substitution:
2x+4(155-x)=550
solve for x. that is the number of 2 legged birds!
then plug x into y=155-x and that will be the number of four legged mammals

1. 👍 0
2. 👎 0
2. 15

1. 👍 1
2. 👎 0

## Similar Questions

1. ### Math

A petting zoo has 5 lambs 11 rabbits 4 goats and 4 piglets. Find the ratio of goats to the total number of animals. THen explain its meaning 1/6? 1 goat for every 6 animals

2. ### English

Need to label the verb wish A for action of L for Linking... 1. The koala bears have climbed the tree. Answer=A 2. The peacock seemed more beautiful than before. Answer=A 3. In the rain forest display at the zoo, the birds looked

3. ### English

Excerpt from The Care and Keeping of Big Cats Part B Kate McConnaughey Like all other animals in captivity, zoo animals require occasional trips to the vet. The veterinarians that handle zoo animals are specially trained in exotic

4. ### math

word problem: Q1.there were 60 birds at three treesin some moment 6 birds flew away from the first tree,8 birds flew away from the second tree, and 4 birds flew away from the third tre. then there were same number of birds at each

1. ### Language Arts, can anyone check?

1. Which statement is shared by both "Zoos: Joys or Jails?" and "Why Do We Need Zoos?" a. clearly stated claim b. humorous introduction c. unsupported facts d. one-sided argument 23 Read the passage. What technique is the author

2. ### english

Which sentence BEST combines the ideas shown below? (I put an arrow on the one I think the answer is) --->A.The football player did not seem seriously injured. As a precaution, the trainers moved him carefully. B.The football

3. ### math

At a zoo, 1/3 of the animals are birds, 4/9 are mammals, and the rest are reptiles and amphibians. What fraction of animals at the zoo are reptiles and amphibians?

4. ### algerbra

sasha researched the size of zoos in her state. she found that the zoo in the north part of the state is almost twice as large as the zoo in the south. she also found that the zoo in the south part of the state has 200 fewer than

1. ### Math

There are 1,500 animals living at the zoo.15% of the animals have feathers. How many animals at the zoo have feathers?

2. ### lang art

1. Read the sentence from "Zoos: Joys or Jails?" What clue word is used to show contrast between the two points of view? "Although the circumstances and reasons for animals being in zoos vary, its concept has faults many don't

3. ### English

Which statement from "Zoos: Joys or Jails?" best captures the author's point of view? "At the zoo they are treated with care, but they should be treated with reverence." "Animals behave differently than they would in their natural

4. ### Mathematics question

A zoo keeper weighed some of the animals at Melbourne Zoo. He found that the lion weighs 90 kg more than the leopard, and the tiger weighs 50 kg less than the lion. Altogether the three animals weigh 310 kg. How much does the lion