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Nadya [2.5K]
3 years ago
7

A rectangle has a width, w, equal to 6 less than the length, l. Which expressions represent ways to find the perimeter of the re

ctangle?
Select ALL that apply.



4 L plus 12
4L−12
2(L−6)+2l
2(6−L)+2l
12+2L+2L
Mathematics
1 answer:
Irina-Kira [14]3 years ago
5 0

Answer:

4L-12

Step-by-step explanation:

let's assume the length = L

then the width of the rectangle is L - 6

perimeter = 2× (a+b)

where "a" and "b" are the length and the width of the rectangle.

so perimeter = 2× (L + L - 6)

2 × ( 2L - 6)

4L - 12

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Correct answer:
26 = -13x
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1 year ago
Enter the indicated element.
Ymorist [56]

a_{1,3} = 9

Step-by-step explanation:

The elements of matrices are represented in the form

a_{r,c}

Here r is the row number and c is the column number.

Given matrix is:

A = \left[\begin{array}{ccc}3&6&9\\2&4&8\end{array}\right]

The elements of matrix will be represented by a_{r,c}

We have to find a_{1,3}

Which means that the first row and third column.

The first row is: 3   6    9 and the element in third column is: 9

So,

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Keywords: Matrices, Elements

Learn more about matrices at:

  • brainly.com/question/10541435
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#LearnwithBrainly

6 0
3 years ago
Simplify.
Ugo [173]


so you take -10.5+5.3+20.2=??

-10.5+5.3=-5.2

-5.2+20.2=15

Ur Answer Is 15

Did I Help??

Hope I Did!!


7 0
3 years ago
Read 2 more answers
Seven and thirty twp hundreths plus two and one tenth times two and seven tenths minus 18a
alexdok [17]
Answer:  Write the expression as:

" 70 \frac{32}{100} +
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______________________________________________________
or;  write as:
______________________________________________________
           " 70.32  + (2.1) * (2.7)  − 18a " ; 
______________________________________________________

To simplify:
______________________________________________________

  Using "PEDMAS" (the "order of operations") ; 

the "multiplication" comes first; 

So:  →  "(2.1) * (2.7) =  5.67 " .

And rewrite:
______________________________________________________
 " 70.32  + 5.67 − 18a " .

Now:  " 70.32 + 5.67 = 75.99 " ; 

So, we can the final simplified expression as:
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   " 75.99  −  18a " ;  

or; write as:  " 75\frac{99}{100}  −  18a " .
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7 0
3 years ago
Choose the best definition for the following term: variable
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Step-by-step explanation:

a variable is a quantity that may change within the context of a mathematical problem or experiment

I hope this was helpful

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