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Nezavi [6.7K]
4 years ago
10

Solve each system of equations using elimination.

Mathematics
1 answer:
stich3 [128]4 years ago
8 0
Add them to eliminate x terms

x+3y=-7
<u>-x-7y=19 +</u>
0x-4y=12

-4y=12
divide by -4
y=-3
sub back
x+3y=-7
x+3(-3)=-7
x-9=-7
x=2

(x,y)
(2,-3)
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2/3 devided by 3/4 plsss
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Answer:

8/9 or 0.889

Step-by-step explanation:

Used a calculator

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That's false.  If they share a congruent angle and the sides adjacent to it are
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Answer:

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Step-by-step explanation:

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3 years ago
Elimination Problem Please I Need HELP this makes me want to die lol
Dominik [7]

Answer:

(-3, 4)

General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right  

Equality Properties

  • Multiplication Property of Equality
  • Division Property of Equality
  • Addition Property of Equality
  • Subtraction Property of Equality<u> </u>

<u>Algebra I</u>

  • Terms/Coefficients
  • Coordinates (x, y)
  • Solving systems of equation using substitution/elimination

Step-by-step explanation:

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

3y = -5x - 3

y = -x + 1

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

Equation y = -x + 1

  1. [Multiplication Property of Equality] Multiply everything by -3:                   -3y = 3x - 3

<u>Step 3: Redefine Systems</u>

3y = -5x - 3

-3y = 3x - 3

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

<em>Elimination</em>

  1. Combine 2 equations:                                                                                   0 = -2x - 6
  2. [Addition Property of Equality] Add 6 on both sides:                                  6 = -2x
  3. [Division Property of Equality] Divide -2 on both sides:                              -3 = x

<u>Step 5: Solve for </u><em><u>y</u></em>

  1. Define original equation:                                                                               y = -x + 1
  2. Substitute in <em>x</em>:                                                                                                y = -(-3) + 1
  3. Simplify:                                                                                                           y = 3 + 1
  4. Add:                                                                                                                 y = 4
4 0
3 years ago
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inysia [295]
15. 

You'd get this by multiplying the -10 by 3 then adding it to both sides. Then divide by 5. 
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