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A slight correction (same answer) 

Density = mass / volume     (not volume/mass)

volume = 27 cm^3    Mass = 27 g      density = 27 g / 27 cm^3 =  1 gm/cm^3     (MUST include units to be correct)

Melody: one tiny mistake......

\(\color{BurntOrange}x\neq -3\qquad x\neq0\)

\(0.291666\\ =\dfrac{291666}{1,000,000}\\ =\dfrac{2\times 3 \times 48611}{2^6\times 5^6}\\ =\dfrac{3\times 48611}{2^5\times 5^6}\\ =\dfrac{145833}{500000}\)

Do say that when the guest is getting too far. Like he is spamming with bad words......

Luckily if you spam the forum will get you a captcha...... lol

Please stop guest

What I have bolded is what I changed.

9/3 + 4

= 3 + 4

= 7 <- Final answer.

~The smartest cookie in the world

Maybe? Or maybe not?

~The smartest cookie in the world.

I am interested. What does this (association? organization? group?) do? Because I just don't want to do anything that does not make sense.

Oh!! I have not tried it yet!! That means I am very good :D

if you get flagged so many times you can get kicked

Maybe you are a kid yourself too? bc I am...... lol

PS I am a 14-year-old kid :P:P:P

Ooh that's interesting.

He can get you kicked, but he is not even an admin!!

I think that we can talk about anything freely on this forum....... instead of maths, we can talk about physics, and science. An evidence that this is allowed, is there is a tag called 'Physics' officially.

This forum is not only maths!!

He is trying to make it where we can only talk about math

if anyone talks about anything else he will try to make you get kicked

May be math.not.maths's interpretation is correct, but I have another:

\(\dfrac{7x^3}{2}-\dfrac{4x^3}{2}\\ =\dfrac{3x^3}{2}\)

No just join, I want to see how far this kid can go.

martindomexk: What is it? Can you explain briefly? If I think that it makes sense I am gonna join.

I was thinking the suggested retail price is what a merchant would charge...however the merchant is able to purchase the item at a wholesale  trade discount price of $34 then take it to their shop and sell it at MSRP $75

what 1 over 2 add 9 over 2

\(\frac{1}{2}+\frac{9}{2}=\frac{10}{2}=5\)

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Guys this is just testing.If 13.8 billion years ago is equal to 24 hours,how much is 3,500,000,000 years ago in hours??

\(13.8 \ US-Billion \ years : 24h=3.5\times 10^9 years:x\)

\(13.8\times 10^9\ years:24h=3.5\times 10^9\ years:x\)

\(\large x=\frac{24h\times3.5\times 10^9years}{13.8\times 10^9years}\)

\(x= 6\ hours\ 5'13''\)

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Invers tan is the same as arc tan

So just use atan    :))

You are not selling it at a discount, but at a PREMIUM!.

75 / 34 =2.2059 - 1 x 100 =120.59%- Premium price at which it was sold. So that:

120.59% x 34 =41,  the premium, and:

$34 + $41 =$75 - Retail sales price.

(75 - 34) / 75 x 100% = discount %

(75-34)/75*100 = 54.66%

Universal Gravitation Equation

The Universal Gravitation Equation is:

F = GMm/R2

where

F is the force of attraction between two objects in newtons (N)

G is the Universal Gravitational Constant = 6.674*10−11 N-m2/kg2

M and m are the masses of the two objects in kilograms (kg) (the moon and the earth)

R is the separation in meters (m) between the objects, as measured from their centers of mass (the moon and the earth)

How many grams of Mg are in a 110g sample of Mg(CN)2?

\(1 \ Mol \ von \ Mg(CN)_2 =(24.305+2(12.011+14.007)g= 76.341g\)

                                                     Mg                  C                     N             

\(x : 24.305g\ Mg=110g \ Mg(CN)_2 : 1Mol \ Mg(CN)_2 \)

\(x : 24.305g\ Mg=110g \ Mg(CN)_2 : 76.341g \ Mg(CN)_2 \)

\(\large x=\frac{24.305g\ Mg\times 110g \ Mg(CN)_2}{76.341g \ Mg(CN)_2 }\)

\(x=35.021g \ Mg\)

In 110g Mg(CN)₂   35.021g Mg are contained.

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