algebra

posted by .

the number of cats that are homeless can be modeled by the equation N= 2.1t squared - 82t + 95 where N is the number of cats that are homeless and t=0 set as the current year.Use the quadratic model to find the number of years from now until the number of homeless cats is equal to 15.need larger number of the two answers to the nearest hundredth.

  • algebra -

    2.1t^2 - 82t + 95 = 15
    2.1t^2 - 82t + 80 = 0

    solve using the quadratic equation formula, I got
    t = 1.00 or t =38.05

  • algebra -

    N=2.1t^2- 82t+95 Since N = 15,
    15=2.1t^2- 82t+95 Now get this quadratic into standard form by subtracting 15 from both sides

    15-15= 2.1t^2- 82t+95-15
    0=2.1t^2- 82t+80 I am not sure what methods you have studied to solve this yet, but I would use the quadratic equation. Where a = 2.1, b = 82 and c = 80
    t= (-b}ã(b^2-4ac))/2a
    t= (-82}6052)/(2(2.1))
    t = -1.00 or -38.04
    Largest would be -1.00

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. WITC math

    There is a bus with 7 girls inside, Each girl has 7 bags, Inside each bag, there are 7 cats, Each cat has 7 small cats, All cats have 7 nipples each. And -- what is your question?
  2. maths

    Scenario: There is a bus with 7 girls inside, Each girl has 7 bags, Inside each bag, there are 7 Big cats, Each Big cat has 7 small cats, All cats have 4 Legs each! 7 big cats times 7 small cats = 49 small cats 49 small cats plus 7 …
  3. Essay Writing

    I need help with making my outline parallel. II. Body A. Needs 1. Feeding a. Cats b. Dogs 2. Training a. Cats b. Dogs 3. Grooming a. Cats b. Dogs 4. Medicating a. Cats b. Dogs B. Personalities 1. Cats a. Playing b. Vocalizing c. Independence
  4. Math

    Two cats are taking a walk. 1 cat runs off. three cats come back. 1 cat sits down. How many cats in all are there if 6 more cats came back with one of the cats being the one that ran off?
  5. Algebra

    In a pet store there are 4 more cats than dogs and the ratio of cats to dogs is 12 to 9.What is the total number of cats and dogs in the pet store?
  6. Algebra

    In a pet store there are 4 more cats than dogs and the ratio of cats to dogs is 12 to 9.What is the total number of cats and dogs in the pet store ?
  7. 4th Grade Math

    The ratio of the number of dogs to the number of cats at an animal shelter is 5:4, if there is a total of 153 cats and dogs, how many cats are in the shelter
  8. Math

    The ratio of the number of cats to the number of dogs in an animal shelter was 2:3. After 120 cats were adopted, the ratio of the number of cats to the number of dogs became 3:7. Find the total number of cats and dogs in the animal …
  9. Math

    Ari runs a training school for pet actors. Last year he trained 3 times as many dogs as cats. if the total number of dogs and cats he trained last year is 84, how many cats did he train?
  10. Mathematics question

    In my town some of the animals are really strange. Ten percent of the dogs think that they are cats and ten percent of the cats think they are dogs. All the other cats and dogs are perfectly normal. One day I tested all the cats and …

More Similar Questions