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EleoNora [17]
4 years ago
11

What is the era of the rectangle on the right?

Chemistry
2 answers:
Andreas93 [3]4 years ago
4 0
12 cm is the answer. 
Mrrafil [7]4 years ago
4 0
You just multiple the base and heaight to get the area of the retangle
3x4=12
12 cm squared
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3 years ago
(-7b + 8c) - (12a + 14) + (5a + 5b) =
Varvara68 [4.7K]

Given problem;

   (-7b + 8c) - (12a + 14) + (5a + 5b) = ?

 To this problem, we open the brackets, collect like terms and factor them.

The order of operation, PEMDAS must be strictly adhered to;

P = Parentheses

E = Exponent

M = multiplication

D = Division

A = Addition

S = Subtraction

(-7b + 8c) - (12a + 14) + (5a + 5b);

  Open the parentheses;

  Note;          + x +  = +

                      + x - = -

                      - x -  = +

                       - x + = -

So,

                     = -7b + 8c -12a - 14 + 5a + 5b

                  Collect like terms;

                     = 5a -12a + 5b - 7b + 8c -14

                     = -7a - 2b + 8c -14

The solution is -7a - 2b + 8c -14

 

7 0
4 years ago
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