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Furkat [3]
3 years ago
14

Find the zeros of y = x^2 - 4x - 9 by completing the square.

Mathematics
1 answer:
Mariulka [41]3 years ago
4 0

Try this option:

x²-4x-9=x²-4x+4-13=(x-2)²-13=(x-2)²-√(13)²

it means, the answer is

\left[\begin{array}{ccc}x=2- \sqrt13\\x=2+ \sqrt13\end{array}\right

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10. Complete the equation to make a true statement. Use the number
Nataliya [291]

The option (B) 2,-2 is correct because the number satisfy the provided expression.

<h3>What is an arithmetic operation?</h3>

It is defined as the operation in which we do the addition of numbers, subtraction, multiplication, and division. It has a basic four operators that is +, -, ×, and ÷.

We have a number bank shown in the picture.

The problem given:

7 - __ =  7 +  __

A. 3,-4

Checking for the above option:

7 - 3 = 7 - 4

4 = 3 (false)

B. 2,-2

Checking for the above option:

7 - 2 = 7 - 2

5 = 5 (true)

O C. 1;-4

Checking for the above option:

7 - 1 = 7 - 4

6 = 3 (false)

D. 2; 3

Checking for the above option:

7 - 2 = 7 + 3

5 = 10 (false)

Thus, the option (B) 2,-2 is correct because the number satisfy the provided expression.

Learn more about the arithmetic operation here:

brainly.com/question/20595275

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8 0
2 years ago
Freeeee pointssss.Take it
satela [25.4K]

Answer:hi

Step-by-step explanation:

5 0
3 years ago
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8.9+3.47 i really need help
ivann1987 [24]
The answer is 12.37 hope this helps
5 0
3 years ago
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What is the volume of a sphere if the radius is 6.3?
Neporo4naja [7]

Answer:

The answer to your question is V = 1046.60 u³

Step-by-step explanation:

Data

Volume = ?

radius = 6.3

π = 3.14

Formula

V = (4/3) πr³

Substitution

V = (4/3) (3.14)(6.3)³

Simplification

V = (1.333)(3.14)(250.047)

V = 1046.6017 u³

- Rounding to two decimal places just consider the six and zero

V = 1046.60 u³

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3 years ago
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Is a ratio always a rate?
kari74 [83]
No it is not always a rate that was easy
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