3 years ago

A division problem is shown

Mathematics

1 answer:

Anit [1.1K]3 years ago

4 0

Answer:

Step-by-step explanation:

hope this helps with the work

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Given the following matrices, what 3 elements make up the first column of the product matrix DA?

Misha Larkins [42]

We have to figure out what the product of DA is,

$\begin{bmatrix}-1&2&3\\8&-4&0\\6&7&1\\ \end{bmatrix}\begin{bmatrix}1\\3\\5\\ \end{bmatrix}=\begin{bmatrix}a\\b\\c\\ \end{bmatrix}$

We know that,

$\begin{bmatrix}a&b&c\\d&e&f\\g&h&i\\\end{bmatrix}\begin{bmatrix}x\\y\\z\\\end{bmatrix}=\begin{bmatrix}ax+by+cz\\dx+ey+fz\\gx+hy+iz\\\end{bmatrix}$

So,

$a=-1\cdot1+2\cdot3+3\cdot5=-1+6+15=20$

$b=8\cdot1+(-4)\cdot3+0\cdot5=8-12=-4$

$c=6\cdot1+7\cdot3+1\cdot5=6+21+5=32$

So the solution is,

$a,b,c=\boxed{20,-4,32}$

Hope this helps :)

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3 years ago

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aniked [119]

Answer:

There's no graph in your question!

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Which of the following is NOT a level of measurement? nominal ratio qualitative ordinal

PSYCHO15rus [73]

Answer:

Nominal.

Step-by-step explanation:

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A map of the United States has a scale of 1 inches = 300 miles. The distance on the map from Boise, Idaho, to Phoenix, Arizona,

Nostrana [21]

Answer:

The distance is 750 miles.

Step-by-step explanation:

In order to find this, we create a proportion. On the left would be the scale factor. On the right would be the Idaho to Arizona distance.

1in / 300 mi = 2.5in / x mi

Now we can cross multiply to find the distance.

300 * 2.5 = 1 * x

750 mi = x

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C is the right answer I’m positive

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