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Yes it is Dragon but can you answer it?

whats _:12= 7:14

\(\frac{x}{12}=\frac{7}{14}\\ \frac{x}{12}=\frac{1}{2}\\ 12*\frac{x}{12}=12*\frac{1}{2}\\ x=6\\\)

I really did not need to make it look so complicated.

7/14 is   1/2

and 6/12 is the same as a half 

so

the missing number is 6

Simplify the following:
12 y^2+9 y^2+17 y-13 y-4+3

Grouping like terms, 12 y^2+9 y^2+17 y-13 y-4+3 = (12 y^2+9 y^2)+(17 y-13 y)+(-4+3):
(12 y^2+9 y^2)+(17 y-13 y)+(-4+3)

12 y^2+9 y^2 = 21 y^2:
21 y^2+(17 y-13 y)+(-4+3)

17 y-13 y = 4 y:
21 y^2+4 y+(-4+3)

3-4 = -1:
21 y^2+4 y+-1

Factor the quadratic 21 y^2+4 y-1. The coefficient of y^2 is 21 and the constant term is -1. The product of 21 and -1 is -21. The factors of -21 which sum to 4 are -3 and 7. So 21 y^2+4 y-1  =  21 y^2+7 y-3 y-1  =  (7 y-1)+3 y (7 y-1):
(7 y-1)+3 y (7 y-1)

Factor 7 y-1 from (7 y-1)+3 y (7 y-1):
Answer: | (7y-1) (3y+1)

This is a ratio problem guys!

\(\sqrt{225}=15\)

Your answer and your graphs are very impressive Solviet but I do not understand what you have done.

I do not understand the question either   

Write the equation of hyperbole which is tangent with the straights 5x-6y-16=0 and 13x-10y-48=0.

This appears to be translated from another language.

I think it might mean

Write the equation of hyperbola where theses straights lines    5x-6y-16=0 and 13x-10y-48=0.    are the asymptotes.

This is an interesting question ://

-(3z^2+4z)-(6z^2-2)    =

-3z^2 - 4z  - 6z^2 + 2  =

-9z^2 - 4z + 2

You are very welcome Guest. Drop by whenever you want and become a member and you can send me a message.

Thanks Guest!

You too Bree

Just look 2 questions below!!!.

1/2x8x6=24 square units.

Solve for x:
-5 x (-4-x) = 0

Divide both sides by -5:
x (-4-x) = 0

Split into two equations:
-4-x = 0 or x = 0

Multiply both sides by -1:
x+4 = 0 or x = 0

Subtract 4 from both sides:
Answer: | x = -4                or x = 0

how do you turn 45/355 to a precent

45/355=0.126760 X 100=12.676%

roots of -4x^2+80x-100

Solve for x:
-(4 x^2)+80 x-100 = 0

Divide both sides by -4:
x^2-20 x+25 = 0

Subtract 25 from both sides:
x^2-20 x = -25

Add 100 to both sides:
x^2-20 x+100 = 75

Write the left hand side as a square:
(x-10)^2 = 75

Take the square root of both sides:
x-10 = 5 sqrt(3) or x-10 = -5 sqrt(3)

Add 10 to both sides:
x = 10+5 sqrt(3) or x-10 = -5 sqrt(3)

Add 10 to both sides:
Answer: | x = 10+5 sqrt(3)             or x = 10-5 sqrt(3)

UNANSWERED  CHEMISTRY question here.

Thanks for the translation Solveit :)

-2cos2x=1       divide both sides by  -2

cos2x  = -1/2

Note......the cos (x)   = -1/2    at   x =   120° + n360°  and at  240° + n360°  where n is an integer

So......

2x  = 120° +n 360°  and at  240° + n360°    divide both sides by 2

x  =    60° + n180°  and at  120° + n180°  where n is an integer  .....and this is the general solution

How do you think that the moderators should behave differently?

What you like us to do differently.

The other moderators are fine the way they are. However, for you, Melody, there is something I’d like you to do differently. I would like you to change the way you present my Valentine's greeting this year.    Last year’s Valentine was kind of “ho hum,” not much spirit. It was just plain, bland. It was so bland it didn’t even exist.

This year, I would like a post with heart-felt romance when you ask me to be your Valentine.   It doesn’t need to be too over-the-top, just give it more spirit and sincerity.  

Here’s an example:

To my dearest Nauseated, I beseech thee from the bottom of my heart to be my Valentine this year. Heart-felt pleas, with pretty please and sugars on top.    :)

You can use this or write your own. You have more than 3 weeks to compose a glorious Valentine greeting. That’s long enough to make it a spare time project.

Thank you for the invite. This should be helpful and I know it is interesting. 

  21 is the answer

They asked what is 21 divided by 21. I believe you'll find the answer to be 1... You shouldn't tell our guest the wrong answer... They may be dumb enough to believe you...

90/100  = x/ 10      cross-multiply

900/100 = x

9 = x

So......90 out of 100  =  9 out of 10

The diagonal of a square is always  sqrt(2)  times as long as the side of the square....so..

3 * sqrt(2) inches  is the diagonal length   ........this is NOT a rational number.....

aaaa thanks CPhill ! :)

Note, Solveit.......the sum of the interior angles of any quadrilateral  = 360°

So .....angles A + B + C + D  = 360°    (1)

A =  2 times angle B →   B  = A/2

A =  4 times angle C →   C  = A/4

A =8 times angle D →   D = A/8

So....substituting into (1)

A + A/2 + A/4 + A/8  = 360°   get a common denominator

[8A + 4A + 2A + A] / 8 = 360°       simplify the left side

15A / 8 =   360°      multiply both sides by 8

15A  =  2880°     divide both sides by 15

A = 192°

So....D  = A/8  = 192° / 8     =   24°    (E)

21 is the answer

Your question doesn't make sense!. State it clearly.