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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 D.) 4.7x^2-1.6x+3.37 i need help ??

Respuesta :

The answer is A) 4.7x²+1.6x+3.27.

When adding the polynomials, we combine like terms:

2.3x²+2.4x² = 4.7x²
-5.6x+7.2x = 1.6x
2.3+0.97 = 3.27

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