A biologist studied the populations of black bear and brown bears over a 10-year period. The biologist modeled the populations, in thousands, with the following polynomials where x is time, in years.

black bears: 2.3x^2 - 5.6x + 2.3
brown bears: 2.4x^2 + 7.2x + 0.97

What polynomial models the total number of brown and black bears?

a) 4.7x^2 + 1.6x + 3.27
b) 4.7x^2 - 1.6x - 3.37
c) 4.7x^2 + 1.6x - 3.37 <---- My Answer
d) 4.7x^2 - 1.6x + 3.37

Guys the math ALWAYS changes the questions up on unit and quizzes so.

you must put the answer, not the letter.

its a

nuttykoko is wrong

No, my test is different

IDK if you have the same answer as me I took the test here are my answers BTW I have 18 questions on the test

1. B 10x^4
2. D -3y^5
3. C 6x^2 + 2x + 8 quad trin
4. A 4.7x^2 + 1.6x +3.27
5. D 71x^2
6. D 15h^2 + 26h - 21
7. B 40w^2 + 41w + 10
8. A 12x^2 - 28x + 16
9. B 50TTx^3 + 240TTx^2 + 168TTx + 32TT
10. B 16x^2 - 48xy^3 + 36y^6
11. B (x + 9) and (x - 3)
12. B (x + 6) and (x - 5)
13. D (x - 6y)(x - 4y)
14. C 5x + 4) and (2x - 1)
15. B (5x + 7) and (x - 2)
16. D 45x^2 + 20x + 1
17. C (w + 8)^2
18. D (t + 5)(t - 5)
I know there are a lot of Bs but it should be correct if you have the same test
it took me a long time to type this out if I get you close to a 100% may I get lots of like?

nutty is that right bro? thanks

I´m checking if @Nuttykoko is correct. I´m really hoping that they, are correct. :)

I got 72.22% AKA 13/18 on the Unit Test. (Polynomials).

1- What is the sum or difference of 2x^4+8x^4?
Answer: B-10x^4
2- What is the sum or difference of 3y^5 – 10y^5?
Answer: A- -7y^5
3- Write the polynomial in standard form. Then name the polynomial based on its degree and number of terms. 6 – 12x + 13x^2 – 4x^2
Answer: B- 9x2 – 12x + 6; quadratic trinomial
4- A biologist studied the populations of black bear and brown bears over a 10-year period. The biologist modeled the populations, in thousands, with the following polynomials where x is time, in years.

black bears: 2.3x2 – 5.6x + 2.3

brown bears: 2.4x2 + 7.2x + 0.97

What polynomial models the total number of brown and black bears?
Answer: A- 4.7x2 + 1.6x + 3.27
5- A sports team is building a new stadium on a rectangular lot of land. The lot measures 8x by 12x and the stadium will be 3x by 6x. How much land will be left for the parking lot?
Answer: A- 78x^2
6- Simplify the product using the distributive property. (5h – 3)(3h + 7)
Answer: D- 15h^2 + 26h – 21
7- Simplify using a table.
(6q + 7)(2q + 3)
6q 7
2q
3
Answer: A- 12q^2 + 32q + 21
8- Simplify the product using FOIL. (6x – 5)(2x – 3)
Answer: A- 12x^2 – 28x + 15
9- A cylinder has a radius of 4x + 2 and a height of 5x + 4. Which polynomial in standard form best describes the total volume of the cylinder? Use the formula V = pi r^2 h for the volume of a cylinder.
Answer: A- 80 pi x^3 + 144 pi x^2 + 84 pi x + 16 pi
10-

My test wasn´t loading the rest of the assignment, I´m really sorry!!
I really hope I helped, atleast a little bit because this is what I would want someone to do for me. :) I hope you all get 100s on your Unit Test. Have a great day!
-Nater<3

I disagree. Why are you subtracting the last terms?