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Dafna1 [17]
3 years ago
8

What number must you add to complete the square x^2+2x=9

Mathematics
2 answers:
MAVERICK [17]3 years ago
5 0

Answer:

+ 1

Step-by-step explanation:

Given

x² + 2x = 9

To complete the square

add ( half the coefficient of the x- term )² to both sides

x² + 2(1)x + 1² = 9 + 1²

(x + 1)² = 10

yaroslaw [1]3 years ago
3 0

Answer:x =(-2-√-32)/-2=1+2i√ 2 = 1.0000-2.8284i

x =(-2+√-32)/-2=1-2i√ 2 = 1.0000+2.8284

Step-by-step explanation:

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Please help this is due tomorrow.<br><br> 1/2 of 20?
Mars2501 [29]

1/2 of 20 is 20/2 which is 10.

All you really need to do here is to divide 20 by 2 to get 10.


6 0
3 years ago
Read 2 more answers
The function h(x) = 12x8 + 49 is an even function. Which transformation of h(x) would result in a function that is neither even
Irina-Kira [14]

Answer:  translation 8 units to the right

Step-by-step explanation:

An even function is a function such that:

h(x) = h(-x)

and the function is odd if:

h(-x) = -h(x)

Now, let's talk about transformations:

A) Reflection over the x-axis:

When we have a point (x,y) and we do a reflection over the x-axis, the reflected point will be:

(x, -y).

Then for the case of a function:

y = h(x).

then the reflection will be:

g(x) = - y = -h(x).

And if h(x) is even, -h(x) is also even, so this is not the correct option.

B) Vertical stretch by a factor of 7.

This is written as:

g(x) = 7*h(x).

then:

g(x) = 7*h(x)

g(-x) = 7*h(-x) = 7*h(x) = g(x)

the transformation is even.

C) Translation of 8 units to the right.

We can write this as:

g(x) = h(x - 8).

Then:

g(-x) = h(-x -8) = h(x + 8)

Then g(-x) is not equal to g(x)

and also g(-x) ≠ -g(x)

So in this case the transformation is neither odd or even.

C)  horizontal compression by a factor of One-half.

This transformation is written as:

g(x) = h( (1/2)*x)

And, similar as the case of the vertical compression, in this case the transformation is also even.

3 0
3 years ago
A sphere has a radius of 9 in, which means its volume is 972π in3. The sphere is dilated by 2⁄3. What is the volume of the new s
swat32

Answer:

08-Oct-2009 — If a spherical balloon has a volume of 972 pi cubic centimeters, what is ... is 4.pi.r^2 (its area remember not volume) as 4/3.pi.r^3=972pi r=9 ... and it is good to know the squares of the next 10 numbers.

3 0
2 years ago
Read 2 more answers
Please help ASAP!!!!!
Over [174]

Answer:

 x = 17/2 = 8.500

Step-by-step explanation:

Equation at the end of step  1  :

 2 • (x - 5) -  7  = 0  

Step  2  :

Equation at the end of step  2  :

 2x - 17  = 0  

Step  3  :

Solving a Single Variable Equation :

3.1      Solve  :    2x-17 = 0  

Add  17  to both sides of the equation :  

                     2x = 17

Divide both sides of the equation by 2:

                    x = 17/2 = 8.500

4 0
3 years ago
A rectangle is 5 inches long and 2x inches wide. The value of the perimeter
Oliga [24]

Answer:

Area=length× berngth

A=5×2x

A=10x square

6 0
1 year ago
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