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Ede4ka [16]
2 years ago
11

Consider the quadratic function.

Mathematics
1 answer:
lilavasa [31]2 years ago
8 0

Answer:

N = -1

explanation:

x = N

solving steps:

\sf f(x)=x^2+2x-15

<u>To find symmetry of a quadratic function.</u>

                                                                   vertex formula    :   \sf x=\dfrac{-b}{2a}

a=1,\:b=2

\sf x=\dfrac{-2}{2\cdot \:1}

\sf  x = -1

Then,

N = -1

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The table below shows four systems of equations:
Ede4ka [16]
To determine which system of equations would have the same solution, we evaluate each system of equations.

System 1 4x − 5y = 2, 3x − y = 8
x = 38/11
y = 26/11

<span>System 2 4x − 5y = 2, 3x − 2y = 1
x = 1/7
y = -2/7

System 3 4x − 5y = 2, 3x − 8y = 4
x = -4/17
y = -10/17

System 4 4x − 5y = 2, 10x − 9y = 4
x = 1/7
y = -2/7

</span><span>
Therefore, the correct answer is option 3. </span><span>System 2 and system 4 are equal, because the second equation in system 4 is obtained by adding the first equation in system 2 to two times the second equation in system 2.

     4x− 5y = 2 2( 3x − 2y = 1)
-----------------------    10x - 9y = 4</span>
4 0
3 years ago
The side length of a square is x+1. write an expression that is equivalent to the perimeter of the square.
Amiraneli [1.4K]
4x + 4

This is because there are four sides of a square, and each side is x + 1.

x + 1 + x + 1 + x +1 + x + 1 = 4x + 4
4 0
3 years ago
Which of the following is a polynomial?
Zanzabum

Answer:

I'm pretty sure A is the correct answer :)

(x-2)(x^4+3) is a polynomial

5 0
2 years ago
Which equation, when solved, results in a different value of x than the other three?
aev [14]
Solve each one to find that D is the answer
8 0
3 years ago
Read 2 more answers
A very large book is numbered to 1 to 11521 How many digits are used to print all these page numbers
stealth61 [152]

Answer:

46,499 digits

Step-by-step explanation:

Total pages of book = 11,521

9 pages numbered 1 - 9 that need 1 digit each = 9 × 1

= 9 digits

90 pages numbered 10 - 99 that need 2 digits each = 90 × 2

= 180 digits

900 pages numbered 100 - 999 that need 3 digits each = 900 × 3

= 2,700 digits

9000 pages numbered 1000 - 9999 that need 4 digits each = 9000 × 4

= 36,000 digits

1522 pages numbered 1000 - 11521 that need 5 digits each = 1522 × 5

= 7,610 digits

Total digits needed = 9 digits + 180 digits + 2,700 digits + 36,000 digits + 7,610 digits

= 46,499 digits

5 0
3 years ago
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