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schepotkina [342]
3 years ago
15

Merek adds 260 and 347. She writes the sum as 7+10+500. What is Merek's mistake?

Mathematics
2 answers:
Marat540 [252]3 years ago
5 0
Those added together should be 607, so the sum would be 600+7. Hope that helped!
In-s [12.5K]3 years ago
3 0

Answer: The sum of the tens is 10 tens not 1 ten

Step-by-step explanation:

<h3>500+<u>10</u>+7=517</h3><h3>then you keep adding 10 until you get 607. Why 607?? Because 260+347+607. Once your done adding count all your tens you will see theres only 10 tens .Your welcome.</h3>
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arsen [322]

Answer:

D. (1, -2)

General Formulas and Concepts:

<u>Pre-Algebra</u>

  • Order of Operations: BPEMDAS
  • Equality Properties

<u>Algebra I</u>

  • Solving systems of equations using substitution/elimination

Step-by-step explanation:

<u>Step 1: Define systems</u>

5x - 2y = 9

3x + 4y = -5

<u>Step 2: Rewrite systems</u>

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3x + 4y = -5

<u>Step 3: Solve for </u><em><u>x</u></em>

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  2. Divide 13 on both sides:                          x = 1

<u>Step 4: Solve for </u><em><u>y</u></em>

  1. Define:                              3x + 4y = -5
  2. Substitute in <em>x</em>:                 3(1) + 4y = -5
  3. Multiply:                            3 + 4y = -5
  4. Isolate <em>y </em>term:                  4y = -8
  5. Isolate <em>y</em>:                           y = -2

And we have our final answer!

8 0
3 years ago
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