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Kazeer [188]
2 years ago
6

If ab = 5 and a² + b² = 25, then (a + b)² =​

Mathematics
2 answers:
matrenka [14]2 years ago
5 0
Answer:
35
Explanation:
Recall that (a+b)^2=a^2+2ab+b^2.
We can rearrange it in a way that would make it easier to solve our problem:
(a^2+b^2)+2ab
Now, we just plug in 25 for a^2+b^2, and plug in 5 for ab:
25+2*5
=25+10
=35
prisoha [69]2 years ago
3 0

Answer:

100

Step-by-step explanation:

because 5+5=10

the 10^2=10*10=100

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Which algebraic expression is a polynomial? 4x2 – 3x + StartFraction 2 Over x EndFraction –6x3 + x2 – StartRoot 5 EndRoot 8x2 +
stealth61 [152]

Answer:

Step-by-step explanation:

"4x2 – 3x + StartFraction 2 Over x EndFraction" is definitely not a polynomial because one of the exponents of x is negative.

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The presence of any root (fractional exponents included) of the variable x automatically disqualifies such expression:  it's not a polynomial.

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Answer:

Option A , should not be rejected

Step-by-step explanation:

From the question we are told that:

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Standard deviation 1 \sigma_1=30

Sample 2 n=16

Standard deviation 2 \sigma_2=20

Level of  confidence \alpha=95\%=>0.95

Generally The Hypothesis are given as

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Therefore

Critical Value

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Therefore

 X=(0.95,24)

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From Table

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Therefore

 T_x

Hence,We fail to reject the Null Hypothesis H_0

Option A , should not be rejected

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