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oksian1 [2.3K]
3 years ago
14

A gardener has 27 pansies and 36 daisies he ants an equal number of each type of flower in each row what is the greatest possibl

e number of pansies in each row
Mathematics
1 answer:
Komok [63]3 years ago
5 0
There are 27 pansies.
The possible rows that will contain equal numbers of pansies are
1 row, 27 pansies in the row, or
3 rows, 9 pansies per row, or
9 rows, 3 pansies per row.

There are 36 daisies.
The possible rows that will contain equal numbers of daisies are
1 row, 36 daisies in the row,
2 rows, 18 daisies per row, or
3 rows, 12 daisies per row, or
4 rows, 9 daisies per row, or
6 rows, 6  daisies per row, or
9 rows, 4  daisies per row, or
12 rows, 3 daisies per row, or
18  rows, 2 daisies per row.

The only common row combination is 3 rows, with 9 pansies and 12 daisies per row.

Answer:  9 pansies in each row.
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Solve by the quadratic formula x^2 = 6x-4
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Please Help Me With Matrices! Fully explain to me what to do, for I have no clue what I am doing. I can substitute, and eliminat
prohojiy [21]
Can you find an explanation of "row operations" with examples in any of your learning materials, online or in print?

Once you get the hang of row ops, it's not terribly hard.  This does, however, take a lot of arithmetic.

<span>−6x−y−5z=−10
− 5x+6y+4z=−7 
2x−3y−2z=3 

can be represented by the matrix  

-6  -1  -5  -10
-5    6  4   -7
 2   -3  -2    3

Our goal is to transform this 3 x 4 matrix so that it ends up looking like:

1  0  0  a
0  1  0  b
0  0  1  c

and the solution you want is the vector (a, b, c) (three numeric values).

</span>I have more or less arbitrarily chosen to start with the third row:   
2   -3  -2    3.  We want this row to begin with a 1, so we multiply each of the original four digits by (1/2), obtaining 1   -3/2   -2/2   3/2, or 1  -3/2   -1   3/2.

We can present the original matrix in any order without changing its value.  Thus, the original 

-6  -1  -5  -10
-5    6  4   -7
 2   -3  -2    3

becomes 

-6  -1    -5  -10
-5    6     4   -7
 1  -3/2  -1   3/2

We want that "1" to appear in the upper, left hand corner of the matrix.  We are free to interchange rows, so we interchange the first and 3rd rows, obtaining 

1  -3/2  -1   3/2
-5    6     4   -7
-6  -1    -5  -10

Next, we manipulate the first row (which begins with 1) so as to get the first element of the 2nd and 3rd rows to be 0.

To achieve this for the 2nd row, we multiply the 1st row by 5, obtaining

5   -15/2   -5   15/2

and then we add this to the existing 2nd row.  The result will be an "0"
in the first column:

0   (6-15/2)   ( 4-5)  (-7+15/2), or   0   -3/2   -1   1/2.

Substitute this new 2nd row for the original 2nd row.  We'll now have:

  1  -3/2  -1   3/2
  0  -3/2   -1   1/2
-6  -1    -5  -10

Now we have to "fix" the 3rd row, so that it starts with a zero (0):
To accomplish this, mult. the first row by 6 and add the resulting new row to the existing 3rd row.  Result should be  0  -10  -11  -1, and the revised matrix will be 

 1  -3/2  -1   3/2
  0  -3/2   -1   1/2
 0  -10    -11  -1

Next steps involve transforming the 2nd column so that it looks lilke

0
1
0.

To do this, mult. the entire 2nd row by -2/3,  Here's the expected result:

0    1     2/3    -1/3

Replace the existing 2nd row with this revised 2nd row:

 1  -3/2  -1   3/2
  0  -3/2   -1   1/2
 0  -10    -11  -1  becomes

 1  -3/2  -1   3/2
 0    1    2/3   -1/3
 0  -10    -11  -1

In the end we want this matrix to look like 

1  0  0  a
0  1  0  b
0  0  1  c

and the solution you want is the vector (a, b, c) (three numeric values).

Use this new 2nd row to further fix the 2nd column, so that it looks like

0 
1
0.


I ask that you go thru this discussion and work out each set of calculations yourself, to verify what I have done so far.  Reply with any questions that arise.  We'll find a way to finish this solution.

8 0
3 years ago
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