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Afina-wow [57]
3 years ago
11

Solve for x. Simplify completely. x^2+4x+4=8

Mathematics
1 answer:
velikii [3]3 years ago
5 0
X^2+4x+4=8
-8                -8
subtract 8 from both sides 

x^2+4x-4=0

now factor using quadratic formula
ax^2+bx+c=0

x= -b +-[ (sqrt (b^2-4ac))/2a ]

x=-2(1+sqrt(2))


x= 2(sqrt(2) -1)

hope that helps, hopefully you know how to plug and chug into quadratic formula. if not you can ask for help


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Tasha says that the expression 6.8w-4.7 can be simplified as 2.1w. Her teacher explains that this is not correct. What mistake d
tatuchka [14]

Answer: She combined unlike terms.

Step-by-step explanation:

You can only combine like terms. If a number has a variable, you must make sure that the number you're operating it with has the same variable raised to the same power (if applicable)

6.8w-4.7 is in its simplest form.

To be able to subtract these, 4.7 must have a ''w'' variable as follows;

6.8w-4.7w=2.1w

7 0
3 years ago
Chelsey puts twelve colored pieces of chocolate candy in a bag. Three pieces are green,
nydimaria [60]

Answer:

A) 3/110  

B) 3/110  

C) 3/110  

D) The order doesn’t matter as long as you are drawing out the same three colors.  The probability doesn’t change.

Step-by-step explanation:  

A) 3/12x3/11x4/10=36/1320= 9/330 = 3/110  

B) 3/12x4/11x3/10=36/1320= 9/330 = 3/110  

C) 4/12x3/11x3/10=36/1320 = 9/330 = 3/110  

D) The order doesn’t matter as long as you are drawing out the same three colors.  The probability doesn’t change.

I hope this helps! Have a good day (PLZ GIVE BRAINLIEST)

8 0
3 years ago
Find the volume of the figure below. Leave answer in terms of t. Round to the nearest hundredth if necessary.
Vinil7 [7]

Answer:

36π

Step-by-step explanation:

d= 6 in

r= d/2=6/2= 3 in

volume of sphere= 4/3πr^3

=4/3 ×π×3^3

=36π in^3

8 0
3 years ago
What is the value of x?<br> 4. = 50-12<br> Enter your answer in the box.<br> x =
Dimas [21]
The question doesn’t make much sense. Do you mean x=50-12? If so, x=38
3 0
3 years ago
Find he measure of Angle A
Yuliya22 [10]

Answer:

25

Step-by-step explanation:

I'm not really sure if this correct its just a guess but here goes.

So as 26x+5 is a vertically opposite angle. So the top angle would be 25x+5.

then we know angles in a triangle add up to 180 degrees so we would add all the angles together. 26x+5+6x-5+20=180. 26x+6x=32x. -5+5=0. 32x+20=180

180-20=160

140/32=5

6×5=30

30-5=25 so angle A is 25?

Please let me know if this is correct and if its not I'm sorry.

4 0
2 years ago
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