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Katena32 [7]
3 years ago
12

GEOMETRY B

Mathematics
2 answers:
Daniel [21]3 years ago
7 0

Answer: The length of the hypotenuse is 12 inches.

Step-by-step explanation:

You need to use the Pythagorean Theorem:

a^2=b^2+c^2

Where "a" is the hypotenuse and "b" and "c" are the legs of the right triangle.

You can say that:

b=6in\\c=6\sqrt{3}in

Therefore, substituting values into a^2=b^2+c^2 and solving for "a", we get that the lenght of the hypotenuse is:

a^2=(6in)^2+(6\sqrt{3}in)^2\\a=\sqrt{(6in)^2+(6\sqrt{3}in)^2}\\\\a=12in

Harman [31]3 years ago
5 0

Answer:

Hypotenuse = 12 inches

Step-by-step explanation:

As the given triangle involves an angle of 90°, this is a right angle triangle.

We an use the Pythagoras theorem to find the length of hypotenuse

So,

(H)^2 = (B)^2 + (P)^2\\H^2 = (6)^2 + (6\sqrt{3})^2\\ H^2 = 36 + (36*3)\\H^2 = 36 + 108\\H^2 = 144\\\sqrt{H^2}=\sqrt{144}\\ H=12\ inches

Hence the length of hypotenuse is 12 inches ..

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ANSWER

24


EXPLANATION

For a matrix A of order n×n, the cofactor C_{ij} of element a_{ij} is defined to be


   C_{ij} = (-1)^{i+j} M_{ij}


M_{ij} is the minor of element a_{ij} equal to the determinant of the matrix we get by taking matrix A and deleting row i and column j.


Here, we have


   C_{11} = (-1)^{1+1} M_{11} = M_{11}


M₁₁ is the determinant of the matrix that is matrix A with row 1 and column 1 removed. The bold entries are the row and the column we delete.


   \begin{aligned} A=\begin{bmatrix} \bf 1 & \bf -6 & \bf -4\\ \bf 7 & 0 & -3 \\ \bf -9 & 8 & -8 \end{bmatrix} \implies M_{11} &= \text{det}\left(\begin{bmatrix} 0&-3 \\ 8&-8 \end{bmatrix} \right)  \end{aligned}


Since the determinant of a 2×2 matrix is


   \det\left(  \begin{bmatrix} a & b \\ c& d  \end{bmatrix} \right) = ad-bc


it follows that


   \begin{aligned} A=\begin{bmatrix} \bf 1 & \bf -6 & \bf -4\\ \bf 7 & 0 & -3 \\ \bf -9 & 8 & -8 \end{bmatrix} \implies M_{11} &= \text{det}\left(\begin{bmatrix} 0&-3 \\ 8&-8 \end{bmatrix} \right) \\ &= (0)(-8) - (-3)(8) \\ &= -(-24) \\ &= 24 \end{aligned}


so C_{11} = M_{11} = 24

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3 years ago
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Step-by-step explanation:

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