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AVprozaik [17]
3 years ago
6

sari has 3 times as many pencil eraser as sam. together they have 28 easers. how many eraser does sari have?

Mathematics
1 answer:
Sholpan [36]3 years ago
4 0
21. if Sam's erasers are represented by x, then sari, who has three times more, would be represented by 3x. since you are adding two together to get 28, the equation would be 28=3x+x. Simplify to 28=4x, divide by 4 to isolate x, where x=7. multiply this by 3 to get sari's amount.
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Given matrices S and T below, which statement is true?
harina [27]
The matrices are
S =(4 11                           T= ( -8 11
      -3  -8)                                 3  4 )
Inverse of a matrix is a matrix derived from another matrix such that if you pre- multiply it with the original matrix you get a unit matrix.
if we multiply S and T
 ST will be 
        ( 4 11    ×      (-8 11   = ( 1 0
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and also TS
          ( -8 11      ×     (4 11  = ( 1 0
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therefore, matrices S and T are inverses of each other because ST = TS= I 



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8 0
3 years ago
Read 2 more answers
PLEASE ANSWERERRREEERRR
Vladimir79 [104]

the operation:

2*10^1 - 4*10^0 = 20 - 4 = 16

Gives a square number.

<h3>How to get a perfect square?</h3>

A perfect square is the product of a number and itself.

As you can see in the example, 16 is a square number. Then let's try to get 16.

To get 16 we can use the difference:

20 - 4

So the first therm needs to be equal to 20, and the second equal to 4.

To write 20 in scientific notation we have:

2*10^1

To write 4 in in scientific notation:

4*10^0

Then the operation:

2*10^1 - 4*10^0 = 20 - 4 = 16

Gives a square number.

If you want to learn more about square numbers:

brainly.com/question/21694652

#SPJ1

5 0
2 years ago
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prohojiy [21]
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6 0
3 years ago
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Can someone please help me I really need help !!!
yanalaym [24]

Answer:sure!

Step-by-step explanation:

your answer is below

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6 0
2 years ago
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A newly opened middle school’s enrollment is currently at 400 students. However, the school is implementing new programs and inc
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500

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