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Kay [80]
3 years ago
11

Write and evaluate the expression. Then, check all that apply.       eight increased by a number;        evaluate when n = 5.3 F

irst, write an expression. The correct expression is n + 8. The correct expression is 8n. Second, substitute 5.3 for the variable, n. Third, simplify by adding 5.3 and 8. Third, simplify by multiplying 5.3 and 8. The answer is 42.4. The answer is 13.3.
Mathematics
2 answers:
Natasha_Volkova [10]3 years ago
7 0

Answer:

A,B,D,E,H

Step-by-step explanation:

First, write an expression.

The correct expression is n + 8.

Second, substitute 5.3 for the variable, n.

Third, simplify by adding 5.3 and 8.

The answer is 13.3.

Mariana [72]3 years ago
6 0

Answer:

a b d e h

hope this helps!

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2+3x^3-7x^3+10

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Answer:

The required polynomial is P(x)=x^4-10x^3+46x^2-96x+72.

Step-by-step explanation:

If a polynomial has degree n and c_1,c_2,...,c_n are zeroes of the polynomial, then the polynomial is defined as

P(x)=a(x-c_1)(x-c_2)...(x-x_n)

It is given that the polynomial R has degree 4 and zeros 3 − 3i and 2. The multiplicity of zero 2 is 2.

According to complex conjugate theorem, if a+ib is zero of a polynomial, then its conjugate a-ib is also a zero of that polynomial.

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R(x)=((x-3)+3i)((x-3)-3i)(x-2)^2

R(x)=(x-3)^2-(3i)^2((x-3)-3i)(x-2)^2     [a^2-b^2=(a-b)(a+b)]

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R(x)=(x^2-6x+18)(x^2-4x+4)                [i^2=-1]

R(x)=(x^2-6x+18)(x^2-4x+4)

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Therefore the required polynomial is P(x)=x^4-10x^3+46x^2-96x+72.

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