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elixir [45]
4 years ago
6

What is the solution to this system of linear equations?

Mathematics
2 answers:
tankabanditka [31]4 years ago
6 0
The correct answer is c
Veronika [31]4 years ago
4 0
Answer is B. (−8, −2)

y − x = 6

y + x = −10
...........................add
2y = -4
  y = -4/2
  y = -2

y − x = 6
-2 - x = 6
     -x = 6 + 2
      x = 8
      x = -8

(-8,-2)



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D. is the correct answer to your question
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3 years ago
Please help me solve thisss (ASAP)
Ksju [112]
The sum of complementary angles is 90 degrees, thus

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=> 6x + 24 = 90
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8 0
3 years ago
Suppose a and b are the solutions to the quadratic equation 2x^2-3x-6=0. Find the value of (a+2)(b+2).
KonstantinChe [14]

Answer:

(a+2)(b+2) = 4

Step-by-step explanation:

We are given the following quadratic equation:

2x^2-3x-6=0

Let a a and b be the solution of the given quadratic equation.

Solving the equation:

2x^2-3x-6=0\\\text{Using the quadratic formula}\\\\x = \dfrac{-b \pm \sqrt{b^2-4ac}}{2a}\\\\\text{Comparing the equation to }ax^2 + bx + c = 0\\\text{We have}\\a = 2\\b = -3\\c = -6\\x = \dfrac{3\pm \sqrt{9-4(2)(-6)}}{4} = \dfrac{3\pm \sqrt{57}}{4}\\\\a = \dfrac{3+\sqrt{57}}{4}, b = \dfrac{3-\sqrt{57}}{4}

We have to find the value of (a+2)(b+2).

Putting the values:

(a+2)(b+2)\\\\=\bigg(\dfrac{3+\sqrt{57}}{4}+2\bigg)\bigg(\dfrac{3-\sqrt{57}}{4}+2\bigg)\\\\=\bigg(\dfrac{11+\sqrt{57}}{4}\bigg)\bigg(\dfrac{11-\sqrt{57}}{4}\bigg)\\\\=\dfrac{121-57}{156} = \dfrac{64}{16} = 4

3 0
3 years ago
1/4 divides by 5/13=?
katrin2010 [14]
1/4 dividend by 5/13 is the same as
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8 0
3 years ago
Simplify the given polynomial expressions as much as possible
bazaltina [42]

Answer:

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Step-by-step explanation:

(12a^2 + 6a -8) - (-22a + 12 - 15a)

12a^2 + 6a - 8 + 22a + 12 - 15a

34^2 + 6a - 8 - 12 + 15a

34^2 + 21a - 20

7 0
2 years ago
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