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lesantik [10]
3 years ago
13

Which property is used in the following problem? (8 x 4) x 5 = 8 x (4 x 5)

Mathematics
1 answer:
Leviafan [203]3 years ago
4 0

Answer:

In this case the Commutative Property is being used.

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Solve the inequality.<br><br><br> n + 9 &lt; −3
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4 years ago
I need help with these questions ( see image for question ).<br>Please show working.<br>​
antiseptic1488 [7]

Answer:

  • k = -4 ± 2√5

Step-by-step explanation:

#22

<h3>Given </h3>
  • Equation x² -4x + 1 = k(x - 4) with equal roots
<h3>To find</h3>
  • The value of k
<h3>Solution</h3>

<u>The equation in standard form is:</u>

  • x² -4x + 1 = k(x - 4)
  • x² - 4x - kx + 1 + 4 = 0
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<u>When the quadratic equation has equal roots its discriminant is zero</u>

  • D = 0
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  • (k + 4)² = 20
  • k + 4 = ± √20
  • k = - 4 ± √20
  • or
  • k = -4 ± 2√5
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3 years ago
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