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1 year ago

Which expressions are polynomials? Select each correct answer.

Mathematics

2 answers:

vodka [1.7K]1 year ago

4 0

answer:35x^2

Step-by-step explanation:

the first one is not b/c its x/5

the second one is not b/c has a square root

the last one it has negative exponents

dimulka [17.4K]1 year ago

3 0

Answer:

Step-by-step explanation:

By definition, the power of each term in a polynomial must be greater than or equal to 0.

So x/5+2 is a polynomial

4x+sqrt(x)-1 is not because sqrt(x) is x^(1/2)

35x^2 is a polynomial

7x^7-x^(-5) is not because -5 is less than 0.

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2 years ago

Select two polynomials that have a sum of 16n^3+13n^2+7n-10 A. 8n^3 - 5n +11n^2 - 5 B. 7n^2 + 8n - n^3 + 2 C. 15n^2 - 10n + 3n^3

andreyandreev [35.5K]

Answer:

Step-by-step explanation:

We have the polynomial

$16n^3+13n^2+7n-10$ ( 1 )

To solve this problem we have to take into account that only we can sum term with the same order in the variable. We have the polynomials

$8n_{3}-5n+11n^{2}-5\\7n^2 + 8n - n^3 + 2\\15n^2 - 10n + 3n^3 - 4\\2n^2 + 12n - 5 + 8n^3$

we can note (by summing term by term) that only the sum of the first and the fourth equation correspond to the given polynomial ( 1 ) of the problem. If we organize these polynomials (that is, write the equation down in a form where higher order appears first ) we have

$8n^3 +11n^2 - 5n - 5\\ 8n^3+2n^2 + 12n - 5\\$

and if we sum we obtain

$16n^3+13n^2+7n-10$

that is what we was looking for

I hope this is useful for you

regards

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