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Hitman42 [59]
3 years ago
12

Which expression is equivalent to 13 - -21

Mathematics
1 answer:
Ber [7]3 years ago
5 0
13 + 21 = 13- -21

The minus sign and negative cancel each other out.
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Question 7 Multiple Choice Worth 1 points)
expeople1 [14]

Answer:

The answer to your question is (3, 0)

Step-by-step explanation:

Data

              4x  +  2y  = 12                 Equation l

                x  -    y   = 3                   Equation ll

Process

To solve this problem use the elimination method

1.- Multiply equation ll by 2

              4x  +  2y  =  12

              2x  -  2y  =    6

              6x      0   = 18

2.- Solve for x

                        6x = 18

                          x = 18/6

                          x = 3

3.- Substitute x in equation ll to find y

                3  -  y  = 3

-Solve for y

                    -y = 3 - 3

                     y = 0

4.- Write the solution

                   (3, 0)

8 0
3 years ago
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For each system of equations, drag the true statement about its solution set to the box
iVinArrow [24]
<h2 /><h2>1</h2>

ONE SOLUTION

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Why is the answer 2 in the subtractive equation 1+1?
Yuki888 [10]

Answer:

That's not a subtractive equation, the symbol that you used indicates that it is an addition equation. if the question was 1-1 then the answer wouldn't be 2 but since the question is 1+1 the answer is 2

Step-by-step explanation:

6 0
2 years ago
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