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Maru [420]
3 years ago
11

Make arguments. Sue said that 200+20+23 is the same as 200+30+3. Is she correct? Explain.

Mathematics
1 answer:
Leya [2.2K]3 years ago
4 0
No she is not correct if she said 200+20+23 was the same as 200+40+3 she would have been correct.
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How are real numbers used to describe real world situations?
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3 years ago
Given the polynomial 2x3 + 18x2 − 18x − 162, what is the value of the coefficient 'k' in the factored form?2x3 + 18x2 − 18x − 16
s344n2d4d5 [400]

Answer:

k=3

Step-by-step explanation:

Let

f(x)=2x^3+18x^2-18x-162

We factor 2 to obtain;

f(x)=2(x^3+9x^2-9x-81)

We factor the polynomial within the parenthesis by grouping.

f(x)=2(x^2(x+9)-9(x+9)

f(x)=2(x^2-9)(x+9)

f(x)=2(x^2-3^2)(x+9)

We apply difference of two squares on the second factor: x^2-3^2=(x-3)(x+3)

f(x)=2(x+3)(x-3)(x+9)

We now compare to;

f(x)=2(x+k)(x-k)(x+9)

It is now obvious that k=3

6 0
3 years ago
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Which of the following fractions is in simplest form? 2/10 3/18 5/65 10/37
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Read 2 more answers
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