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KatRina [158]
3 years ago
7

3.Can we multiply a 2x3 matrix by a 3x2 matrix? If yes, what dimensions will the product matrix AB have ?

Mathematics
2 answers:
Allushta [10]3 years ago
4 0

Answer:

Yes, the dimensions will be 2x2

Step-by-step explanation:

When multiplying matrices you have AxB by CxD. You can only multiply matrices if the inner number is the same.

Ex. 2x3 by 3x2 or QxD by DxW

The dimensions of the result will depend on the outer numbers.

Ex. 2x3 by 3x2 has a 2x2 result or QxD by DxW has a QxW result  

Andrew [12]3 years ago
3 0
I don’t get this at all but I think so
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To begin solving this system of linear equations by elimination you can add the equations. 3x + 2y = 38 5x – 2y = -30 8x = 8 Thi
WITCHER [35]

Answer:

D

Step-by-step explanation:

Addition property of equality

3 0
3 years ago
Lia, Phil, and Cam collect a total of 200.30 dollars for a holiday fundraiser. Phil collects 12.80 dollars more than Lia. Cam co
kramer

Answer:

 Lia collects $ 37.5 ,  Phil collects  $50.3  and Cam collects dollars $ 112.5 .

Step-by-step explanation:

Let us assume that the dollar collect by the Lia be x .

As given

Lia, Phil, and Cam collect a total of 200.30 dollars for a holiday fundraiser.

Phil collects 12.80 dollars more than Lia.

Phil collects dollars = 12.80 + x

As given

Cam collects 3 times as much as Lia.

Cam collects dollars = 3x

Than the equation becomes

x + 12.80 + x + 3x  = 200.30

12.80 +  5x  = 200.30

5x =  200.30 - 12.80

5x = 187.5

x = \frac{187.5}{5}

x = $ 37.5

Thus

Lia collects dollars =  $ 37.5

Phil collects dollars = 12.80 + 37.5

                                = $50.3  

Cam collects dollars = 3 × 37.5

                                  = $ 112.5

Therefore the  Lia collects $ 37.5 ,  Phil collects  $50.3  and Cam collects dollars $ 112.5 .

5 0
3 years ago
Please help me I don’t know it. Can I get an step by step explanation please?
agasfer [191]

Answer:

The answer is no

Step-by-step explanation:

Even though there are 8 pieces its not even

Pls let me know if the answer is correct or not

3 0
3 years ago
Read 2 more answers
Solve 3-2cos²x-3sinx=0 for 0≤x≤360
crimeas [40]
<span>3-2(Cosx)^2 - 3Sinx = 0.

Recall (Sinx)^2 + (Cosx)^2  = 1.
Therefore  (Cosx)^2 =  1 - (Sinx)^2
Substitute this into the question above.

</span><span>3-2(Cosx)^2 - 3Sinx = 0
3 - 2(1 - (Sinx)^2)  - 3Sinx = 0  Expand
3 - 2 + 2(Sinx)^2  -  </span><span><span>3Sinx = 0</span>
1 + 2(</span><span>Sinx)^2  - 3Sinx  = 0  Rearrange
2(Sinx)^2 </span><span><span>- 3Sinx + </span>1  = 0 
Let p = Sinx
2p^2  -  3p + 1  = 0    Factorise the quadratic expression
2p^2 - p - 2p +1 = 0
p(2p -1) - 1(2p -1) = 0
(2p-1)(p -1) = 0

Therefore  2p-1=0    or  (p-1) = 0
2p=0+1    or  (p-1) = 0
2p=1       or    p = 0 +1.
p=1/2       or  p = 1            Recall p = Sinx

Therefore Sinx = 1/2 or 1.
For  0<u><</u>x<u><</u>360

Sinx =1/2,  x = Sin inverse (1/2) , x = 30, 
                                   (180-30)- 2nd Quadrant = 150 deg
Sinx = 1,  x = Sin inverse (1) , x = 90

Therefore x = 30,90 & 150 degrees.

Cheers.</span>
7 0
3 years ago
I need a lot of help please! ):<br><br> If you don’t know please do not comment.
damaskus [11]

Step-by-step explanation:

scale up :

.05

1/2

7

scale down :

13

25

102

7 0
3 years ago
Read 2 more answers
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