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ella [17]
3 years ago
7

Solutions to 2-variable equations

Mathematics
2 answers:
Galina-37 [17]3 years ago
8 0

Answer:

B) only (-3 , 3)

Step-by-step explanation:

y = -3x - 6

(-4,4)    y = -3 x (-4) - 6 = 12 - 6 = 6   .... incorrect

(-3,3)    y = (-3) x (-3) - 6 = 9 - 6 = 3   ..... correct

fredd [130]3 years ago
5 0

Answer:

B

Step-by-step explanation:

To determine which point is a solution, substitute into the left side of the equation and if it is equal to the right side then it is a solution.

(- 4, 4 )

- 3(- 4) - 4 = 12 - 4 = 8 ≠ 6 ← Not a solution

(- 3, 3 )

- 3(- 3) - 3 = 9 - 3 = 6 ← Solution

Thus (- 3, 3 ) is the only solution → B

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Answer:

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General Formulas and Concepts:

<u>Pre-Algebra</u>

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Step-by-step explanation:

<u>Step 1: Define</u>

<em>Identify</em>

(3x³ - 2x² + 4x - 8) - (5x³ + 12x² - 3x - 4)

<u>Step 2: Simplify</u>

  1. [Distributive Property] Distribute negative:                                                    3x³ - 2x² + 4x - 8 - 5x³ - 12x² + 3x + 4
  2. Combine like terms (x³):                                                                                   -2x³ - 2x² + 4x - 8 - 12x² + 3x + 4
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  4. Combine like terms (x):                                                                                    -2x³ - 14x² + 7x - 8 + 4
  5. Combine like terms:                                                                                         -2x³ - 14x² + 7x - 4
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