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ioda
3 years ago
13

The vertex of this parabola is at (2,-4). When the y-value is -3, the x-value is

Mathematics
2 answers:
Fed [463]3 years ago
6 0

Answer:

Step-by-step explanation:

The equation of a parabola in vertex form is

y = a(x - h)² + k

where (h, k) are the coordinates of the vertex and a is a multiplier

here (h, k) = (2, - 4), thus

y = a(x - 2)² - 4

To find a substitute (- 3, - 3) into the equation

- 3 = a(- 3 - 2)² - 4

- 3 = 25a - 4 ( add 4 to both sides )

1 = 25a ( divide both sides by 25 ), hence

a = \frac{1}{25}

y = \frac{1}{25} (x - 2)² - 4 ← in vertex form

  = \frac{1}{25} (x² - 4x + 4) - 4 ← in expanded form

Hence the coefficient of the x² term is \frac{1}{25}

vampirchik [111]3 years ago
5 0

Answer:-5

Step-by-step explanation:

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According to a survey of college students, the use of social media varies widely according to age. Based on the survey, what is
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Answer:

C. 65

Step-by-step explanation:

The table which shows the results of the survey are attached below.

From the table:

  • Total Number of non-social media users = 71
  • Number of non-social media user aged 28 and up = 46

Therefore, the probability that a non-social media user is an older student aged 28 and up

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The probability that a non-social media user is an older student aged 28 and up is 65%.

<u>The correct option is C. </u>

4 0
3 years ago
Select the correct scientific notation form of this numeral.
ioda

The scientific notation for the number 1063 is 1.063×10³ after using the concept of fraction option (B) 1.063×10³ is correct.

<h3>What is the number?</h3>

A number is a mathematical entity that can be used to count, measure, or name things. For example, 1, 2, 56, etc. are the numbers.

It is given that:

The number is 1063

As we know the scientific notation can be written as:

\rm = A\times10^a

1063 can be written as:

= 1063  

= (1063/1000)1000

1.063×10³

Thus, the scientific notation for the number 1063 is 1.063×10³ after using the concept of fraction option (B) 1.063×10³ is correct.

Learn more about the number here:

brainly.com/question/17429689

#SPJ1

8 0
2 years ago
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Sergio [31]

Answer:

A, E, And D

Step-by-step explanation:

i did the quiz :)

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I need help finding the anwser for 52 divided (13 x 2)
Goshia [24]

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Step-by-step explanation:

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