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Maru [420]
3 years ago
8

What matrix results from −6·A?

Mathematics
1 answer:
Andrews [41]3 years ago
8 0

Multiplying a matrix by a constant scales every entry in the matrix by that constant:

A=\begin{bmatrix}-3&5&2\\8&-1&3\end{bmatrix}\implies-6A=\begin{bmatrix}18&-30&-12\\-48&6&-18\end{bmatrix}

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The length of two complementary angles are x and 2x+12. Find the measures of the angles.
Shtirlitz [24]

There's no such thing as the "length"of an angle. 
But we know what you're getting at.

You have said that the angles are complementary.  If two angles are
complementary, then  their sum is 90 degrees, so we can take your
two angles and write:

                       <u>x</u>  (one angle) plus <u>(2x + 12)</u> (the other one) <u>= 90 degrees

</u>
<u />                          x + 2x + 12  =  90<u>

</u>
Subtract 12 from each side:     x + 2x  =  78

Add the x's on the left side:        3x      =  78

Divide each side by  3 :                x      =  26 degrees

One angle is 'x'  =  <em>26 degrees</em>

The other one is (2x + 12) = 52+12 = <em>64 degrees</em>
4 0
3 years ago
The length of a room is 10 and 1/2 feet what is the length of the room in inches
yulyashka [42]
First, 10 1/2 is the same as 21/2

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3 0
3 years ago
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2 years ago
Write y=-3x^2+12x-21 in vertex form
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Complete the square: 
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3 years ago
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Answer:

x + 1, y + 1

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For every x there is a y

(っ◔◡◔)っ ♥ Hope It Helps ♥

7 0
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