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Lana71 [14]
3 years ago
8

2) On a certain day, the temperature

Mathematics
2 answers:
jarptica [38.1K]3 years ago
6 0

Answer:

D

Step-by-step explanation:

the answer is d because i said

kaheart [24]3 years ago
4 0

Answer:

D

Step-by-step explanation:

temp = -3(hours)

-33=-3(hours)

hours=11

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Television networks rely on surveys to determine how many people watch their programs. In a survey of 3,000
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A Parallelogram must be a rectangle when it’s •A.)Diagnols are perpendicular •B.Diagnols are congruent •C. opposite sides are pa
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Walmart is selling 5 notebooks for $4.00. How much is it to buy 12 notebooks?
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3 years ago
For waht values of x do the vectors -1,0,-1), (2,1,2), (1,1, x) form a basis for R3?
DaniilM [7]
<h2>Answer:</h2>

The values of x for which the given vectors are basis for R³ is:

                        x\neq 1

<h2>Step-by-step explanation:</h2>

We know that for a set of vectors are linearly independent if the matrix formed by these set of vectors is non-singular i.e. the determinant of the matrix formed by these vectors is non-zero.

We are given three vectors as:

(-1,0,-1), (2,1,2), (1,1, x)

The matrix formed by these vectors is:

\left[\begin{array}{ccc}-1&2&1\\0&1&1\\-1&2&x\end{array}\right]

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\begin{vmatrix}-1 &2 & 1\\ 0& 1 & 1\\ -1 & 2 & x\end{vmatrix}=-1(x-2)-2(1)+1\\\\\\\begin{vmatrix}-1 &2 & 1\\ 0& 1 & 1\\ -1 & 2 & x\end{vmatrix}=-x+2-2+1\\\\\\\begin{vmatrix}-1 &2 & 1\\ 0& 1 & 1\\ -1 & 2 & x\end{vmatrix}=-x+1

Hence,

-x+1\neq 0\\\\\\i.e.\\\\\\x\neq 1

4 0
3 years ago
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