Solve the following equation by completing the square

x^2+4x-4=0

Answers

Answer 1

Answer:

x = ±2[tex]\sqrt[]{2}[/tex]-2

Step-by-step explanation:

x^2+4x-4=0

x^2+4x=4

x^2+4x+4=4+4

(x+2)^2=8

x = ±2[tex]\sqrt[]{2}[/tex]-2


Related Questions

Can someone help me pls

Answers

Answer:

The answer is No you cannot turn it into a circle

determine the geometric mean of 8 and 12, to the nearest tenth.

Answers

Answer:

is 10

Step-by-step explanation:

i can not figure it out

Answer:

1,3,5,7,10

Step-by-step explanation:

y = 7x + 19
-21 x 3y = 57

Answers

Answer:

x= -2 y= -5

Step-by-step explanation:

Desert recipe calls for 6 cups of cereal for every 4 cups of marshmallows if a baker makes a 25 cup batch of treats using the proportions of the recipe which statement is true

1. The baker uses 6 of cereal and 19 cups of marshmallows

2 The baker uses 10 cups of cereal and 15 cups of marshmallows

3. The baker uses 15 cups of cereal and 10 cups of marshmallows

4. The baker uses 19 types of cereal and 6 cups of marshmallows

Answers

Answer:

3

Step-by-step explanation:

The ratio cereal to marshmallow is 3:2 which is also the ratio in number 3. 15:10 can be simplified to 3:2.

what is the scale factor of each model?

Answers

Answer:

5 inches

-I really tried

An airplane is flying on a bearing of 330 degrees at 450 mph. Find the component form of the velocity of the airplane.

Answers

Answer:

The component form of the velocity of the airplane is [tex]\vec v = 389.711\,\hat{i} -225\,\hat{j}\,\left[\frac{m}{s} \right][/tex].

Step-by-step explanation:

Let suppose that a bearing of 0 degrees corresponds with the [tex]+x[/tex] direction and that angle is measured counterclockwise. Besides, we must know both the magnitude of velocity ([tex]\|\vec v\|[/tex]), in miles per hour, and the direction of the airplane ([tex]\theta[/tex]), in sexagesimal degrees to construct the respective vector. The component form of the velocity of the airplane is equivalent to a vector in rectangular form with physical units, that is:

[tex]\vec v = \|\vec v\|\cdot (\cos \theta \,\hat{i}+\sin \theta\,\hat{j})[/tex] (1)

If we know that [tex]\|\vec v\| = 450\,\frac{mi}{h}[/tex] and [tex]\theta = 330^{\circ}[/tex], then the component form of the velocity of the airplane is:

[tex]\vec v = 389.711\,\hat{i} -225\,\hat{j}\,\left[\frac{m}{s} \right][/tex]

The component form of the velocity of the airplane is [tex]\vec v = 389.711\,\hat{i} -225\,\hat{j}\,\left[\frac{m}{s} \right][/tex].

Help please, and don't comment just to get the points :(

Answers

Answer:

60 degrees

Step-by-step explanation:

As the triangle is similar angle don't change so 50+70=120 and the angle of a triangle total to 180 so 180-120=60

Answer:

60°

Step-by-step explanation:

As it is said that the triangles are similar so In the similar triangles corresponding angles are equal so

< A = 50°

<E = 70°

< B = < E = 70° { being corresponding angles of similar triangles }

Now

< A + <B + < C = 180° {Being sum of angles of triangle }

50° + 70° + < C = 180°

< C = 180° - 120°

< C = 60°

Hope it will help :)❤

if I have one broccoli and my teacher gives me two broccolis how many broccolis do I have​

Answers

three broccz babeyyy ✨‍♀️

Answer:

Step-by-step explanation:

I'm sure of it i even used my calculatr... it 13

8n+12+(-9)-(-6n)}8n+12+(−9)−(−6n)

Answers

Answer

8 n-1(-6n)+3

Step-by-step explanation

Hey! Could I get a lil bit of help? (10 points)
Which of the sets of ordered pairs represents a function? (5 points)

A = {(3, −5), (4, 6), (−3, 9), (2, 7)}
B = {(2, 4), (−1, −7), (5, 6), (4, 3)}

Group of answer choices

Only A

Only B

Both A and B

Neither A nor B

Answers

Answer:

Neither A nor B

Step-by-step explanation:

Neither set of order pairs represent a function, because none of the points have a correlating function throughout them.

What is 2(10) + 2(x – 4)

Answers

Answer:
2x + 12

Explanation:
2(10) = 20
2(x - 4) = 2x - 8
20 - 8 = 12

If p : q = 2/3 : 3 and p : r = 3/4 : 1/2 , calculate the ratio p : q : r Giving your answer in its simplest form.

Answers

Answer:

Step-by-step explanation:

p:q = ⅔:3 = 2:9 = 6:27

p:r = ¾:½ = 3:2 = 6:4

p:q:r = 6:27:4

please answer 1-8 godbless​

Answers

Answer:

1. A

2. D

3. B

4. B

5-6. B

7. D

8. D

Ilk defa buraya giriş yapıyorum sırf deneme için bir soru paylaşıyorum. 23*11= yukarıdaki soruyu yaparsanız sevinirim

Answers

Cevap:

253

Adım adım açıklama:

23 ve 11'in çarpımı;

_____2 ___ 3

___ * _ 1 ____1

_________

_____2____3

_ + _ 2_3

____________

__2__5____3

____________

Dolayısıyla 23 * 11'in çarpımı 253'tür.

Hesap makinesi problemi çözmekte zorlanırsa aynı sonuç.

Find the rule and complete the table

Answers

Answer:

In-33

out-58

rule, subtract 4

Given the first term and common ratio: Find the 10th Term. The first term is equal to 1 and the common ratio is
equal to -2.

Answers

Answer:

-512

Step-by-step explanation:

The appropriate general formula for a geometric series is a(n) = a(1)*r^(n - 1).

In this problem the first term, a(1) = 1, and the common ratio is r = -2.  The pertinent geometric series is thus:

a(n) = (-2)^(n - 1), and the 10th term is a(10) + (-2)^(10 - 1) = -512 = a(10)

Mei has 8 jars of soup. Each jar contains 300 milliliters of soup. What is the smallest pot Mei can use to heat all of the soup?

A) 2 liters
B) 1 liter
C) 3 liters
D) 4 liters

Answers

i think that it would be C sorry if wrong

Help me!!



Dakota saves about $4 every day. She had $7 before she started saving. Her total savings is more than $25. About how many days may Dakota have saved?

Answers

The answer to this question is 5 days

Answer:

5

Step-by-step explanation:

7+4=11

11+4=15

15+4=19

19+4=23

23+4=27

I need help. This is due today

Answers

Answer:

B- Max has 10$. He earns 25.75$ for every lawn that he mows.

D is also an answer.

Step-by-step explanation:

This equation is an example of the formula y=mx+b, where mx is the slope and b is the y intercept, the slope is a continuous thing where as the y- intercept is like a beginning point.

So, A is incorrect because it puts 25.75 as the y intercept when it should be the slope. C is wrong because that is not even the kind of equation we are working with, and E is a different equation. I think the only possible answers are B and D

Please answer this!!! thanks

Answers

Answer:

48

Because 12x4 is 48 and 48/4=12

person on top of me is right

soda bottles each
The machine can make
minute.
The graph shows the relationship between time
and the number of soda bottles a machine can
make. Use the points (2,40) and (6,120) to find
the number of soda bottles the machine can make
each minute.
Number of Soda Bottles Made
200
160
120
Number of Soda Bottles
80
40
8
10
Time (minutes)

Answers

Answer:

20 Soda Bottles.

Step-by-step explanation:

I have done questions like this before.

Point T bisects UV. Find UV if UT = 2 inches

Answers

4 inches. Bisect means the halfway point.

Look at the figure. Find the value of x

Answers

Answer:

x=15

Step-by-step explanation:

This is an Isosceles Triangle, so that means there are two angels that are the same. So we could rearrange the equations to get:

[tex]3x=5x-30\\\text{ subtract 5x on both sides }\\\\-2x=-30\\\text{ divide by two on both sides }\\x=15\\[/tex]

Hope it helps.

The graph below shows how far a ship is traveling in a certain amount of time.

How far will the ship travel in 4 hours?

50 miles

100 miles

4 miles

75 miles

Answers

Answer:

100 miles

Step-by-step explanation:

Remark

All you need do is start at 4 hours on the y axis and go right until you hit a dot. When you do, go down until you hit a number on the x axis.

It helps if you mark up the graph.

Go right from 4

You hit a dot

Look down.

You should see 100. That's how far you go in 4 hours.

Note

This is an odd graph. Usually time is on the x axis.

Can anyone find d-bar (the d with the line over it) and explain it to me? For this problem five trials are done at eight am and then twelve am. The eight am trials are 98.4, 98.6, 97.8, 97.1, and 97.5. The 12am ones are 98.9, 99, 97.9, 96.6, and 97.7. The correct answer is -0.14 but I can't get that answer.

Answers

Answer:

d-bar= ∑d/n= -0.7/ 5= -0.14

Step-by-step explanation:

Eight am             12 am             difference (8:00am- 12:00 am)= d

98.4                      98.9              (98.4-98.9=) -0.5

98.6                       99               (98.6-99=) -0.4

97.8                       97.9            (97.8-97.9=) - 0.1

97.1                       96.6             (97.1-96.6=)+0.5

97.5                       97.7              (97.5-97.7=)-0.2        

∑                                                  -0.7        

d= difference between 8 am and 12 am

First we subtract the 12.00 am times from 8:00 am times.

Then we add all the differences to get the total difference ∑d.

∑d= -0.7= total of the difference between two times.

n= number of observations=5

Putting the values in the formula would give the answer.

d-bar= d`= ∑d/n= -0.7/ 5= -0.14

Can someone help me please

Answers

Answer:

Domain: -3,-2,0,2

Range: 2,-2,-3,-1,1

Step-by-step explanation:

Domain is the x values and the Range is the y values

Help me Ill give brainlist

Answers

Answer:

18π + 90

Step-by-step explanation:

The perimeter is the sum of quarter of the circumference and 2r , that is

P = 2πr + (45 + 45)

  = 2 × π × 36 × [tex]\frac{1}{4}[/tex] + 90

  = 2 × π × 9 + 90

  = 18π + 90

Please help, round to the nearest thousandth

Answers

Answer: 188.5

Step-by-step explanation:

A=2(πrh)+2(πr^2) (formula)

188.49556

Whoever gets this correct gets brain, 5 stars and a thanks! An explanation of it would be amazing! Tysm!
It might take me a little while to respond!

Answers

For d and e are correct
I really hope this helps! Have an awesome day:D
D and E, I took this test and I got it right :)

Please help quarter ends tomorrow and I don’t know what to do I’m failing all my classes

Answers

Answer:

[tex]-x+4[/tex]

Step-by-step explanation:

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