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4 years ago

ASAP need today

Mathematics

2 answers:

r-ruslan [8.4K]4 years ago

8 0

The correct answer is x^2 + 18x + 81 = 125

Because completing the square requires adding (b/2)^2 to both sides, and in our cause b is 18, so (18/2)^2 = 81

Add 81 to both sides and you have x^2 + 18x + 81 = 125.

Answer is correct; I took the test.

aivan3 [116]4 years ago

7 0

The answer would be
x² + 18x + 81 = 44 + 81

To complete the square, we look at the value of b (the coefficient of x). We take half of it, then square it; this is the number that gets added to both sides.

18/2 = 9; 9²=81

Therefore we add 81 to both sides.

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The following estimated regression equation based on 30 observations was presented. ŷ = 17.6 + 3.8x1 − 2.3x2 + 7.6x3 + 2.7x4 The

trapecia [35]

Answer:

a) = 0.9739

b) = 0.969

c) option A is correct

Step-by-step explanation:

Given that:

sample size n = 30

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SSR = 1756

$R^2 = \dfrac{SSR}{SST} \\ \\ R ^2 = \dfrac{1756}{1803} \\ \\ \mathbf{R^2 =0.9739}$

The adjusted $R_a^2$ is computed as:

$R_a^2 = 1 - (\dfrac{n-1}{n-p})(1-R^2)$

where;

$p = k+1 \\ p= 4+1 = 5$

$R_a^2 = 1 - (\dfrac{30-1}{30-5})(1-0.9739)$

$R_a^2 = 1 - (\dfrac{29}{25})(0.0261)$

$R_a^2 = 1 - (1.16)(0.0261)$

$R_a^2 = 1 -0.030276$

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3 years ago

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Sedaia [141]

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4 years ago

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NNADVOKAT [17]

Answer:

2.6

Step-by-step explanation:

I used the a^2+b^2=c^2 to get this answer. I squared all the number given and got 16 and 9. Then I subtract them to get 7. Finally square 7 off and got 2.6 as the final answer

Hope this helped

$\sqrt{7} = 2.6$