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tatiyna
3 years ago
13

I really don't understand number 10 please help

Mathematics
2 answers:
Artemon [7]3 years ago
8 0
For an ordered pair to satisfy a function , it's a must that when you plug x , you get the value of y and vise versa :

y = -6x - 2 

Check for pair ( -1,-8)

y = -6 * -1 -2 = 6 -2 = 4 

y after substitution is not equal to given y ( 8 )

so refused ordered pair.

Check for pair (-3, 16)

y = -6 * -3 -2 = 18 -2 = 16

CORRECT , so this satisfy the function

and so on.


REY [17]3 years ago
4 0
You would plug them in and see if they work. B  and D work
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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
  • x² - (k + 4)x + 5 = 0

<u>When the quadratic equation has equal roots its discriminant is zero</u>

  • D = 0
  • b² - 4ac = 0
  • (k + 4)² - 4*5 = 0
  • (k + 4)² = 20
  • k + 4 = ± √20
  • k = - 4 ± √20
  • or
  • k = -4 ± 2√5
5 0
2 years ago
A used automobile dealership recently reduced the price of a used compact car by 6%. If the price of the car before discount was
Alchen [17]

Answer:

The discount = $1,128

New price = $17,672

Step-by-step explanation:

Price of car before discount = $18,800

Discount given = 6% of price of car

Discount value in dollars = 6% of $18,800 = 6/100*$18,800 = $1,128

Thus, the discount is $1,128

New price = Price of car before discount - discount = $18,800- $1,128

New price = $17,672

7 0
3 years ago
Which of the following equations is quadratic?
sladkih [1.3K]
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2 years ago
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Answer:

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Step-by-step explanation:

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7 0
2 years ago
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Step-by-step explanation:

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