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kakasveta [241]
3 years ago
15

HELP PLEASE!!!! Find the length of BC А.53.74 B.96.95 C.84.79 D26.05

Mathematics
1 answer:
madam [21]3 years ago
4 0

Answer:

D 26, 05

Step-by-step explanation:

(look at picture attached)

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Find a nonzero vector orthogonal to the plane through the points: ????=(0,0,1), ????=(−2,3,4), ????=(−2,2,0).
ser-zykov [4K]

Answer:

The nonzero vector orthogonal to the plane is <-9,-8,2>.

Step-by-step explanation:

Consider the given points are P=(0,0,1), Q=(−2,3,4), R=(−2,2,0).

\overrightarrow {PQ}==

\overrightarrow {PR}==

The nonzero vector orthogonal to the plane through the points P,Q, and R is

\overrightarrow n=\overrightarrow {PQ}\times \overrightarrow {PR}

\overrightarrow n=\det \begin{pmatrix}i&j&k\\ \:\:\:\:\:-2&3&3\\ \:\:\:\:\:-2&2&-1\end{pmatrix}

Expand along row 1.

\overrightarrow n=i\det \begin{pmatrix}3&3\\ 2&-1\end{pmatrix}-j\det \begin{pmatrix}-2&3\\ -2&-1\end{pmatrix}+k\det \begin{pmatrix}-2&3\\ -2&2\end{pmatrix}

\overrightarrow n=i(-9)-j(8)+k(2)

\overrightarrow n=-9i-8j+2k

\overrightarrow n=

Therefore, the nonzero vector orthogonal to the plane is <-9,-8,2>.

8 0
4 years ago
Put these integers in order from least to greatest.<br> 34, 0, – 17, - 56 , 5
tigry1 [53]

Answer: -56 -17 0 5 34

Step-by-step explanation:

The more left you go on a number line the smaller it is

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Solve the inequality 2ax-3&lt;4x+5a for all possible values of the parameter a
olga_2 [115]

Answer:

Step-by-step explanation:

2ax−3<4x+5a

Step 1: Add -5a to both sides.

2ax−3+−5a<5a+4x+−5a

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Step 2: Add 3 to both sides.

2ax−5a−3+3<4x+3

2ax−5a<4x+3

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3 years ago
The city park in which Allen plays is a square and measures exactly one million square feet. Which side dimensions produce the m
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A- 998.8×997.7=996502.76
B- 998.84×997.73=996572.6332
C- 998.843×997.731=996576.6252
D - 999×998=997002

So D is the answer
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4 years ago
Everyone plz help me this is hard for me
timofeeve [1]

Answer:

51

Step-by-step explanation:

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