Hei has the element shown for his science experiment. How many kilograms of the material does he have?
(1,000 grams = 1 kilogram)

3.508 kg of the material

Step-by-step explanation:

I think your question is missed of key information, allow me to add in and hope it will fit the original one.  

Please have a look at the attached photo.  

My

Given that:

1 kilogram is 1000 grams.

A box that has three thousand, five hundred eight grams <=> 3508 grams

How many kilograms of the material does he have? we have got:

x kg - 3508g

<=> 1000x = 3508

<=>

<=> x = 3.508

So he has 3.508 kg of the material

Hope it will find you well.

hello from mrbilldoesmath!

answer:   (7x + 6y) ( 49x^2 - 42xy + 36y^2)

discussion:

in general, the factorization of a^3 + b^3 is

a^3 + b^ 3 = (a + b) ( a^2 - ab + b^2)

in our case note that 343 = 7^3 and 216 = 6^3 so the equation becomes:

343x^3 + 216y^3 = (7x)^3 + (6y)^3

if you think of a (above) as 7x and b as 6y the factorization becomes

343x^3 + 216y^3 =

((7x + 6y) (   (7x)^2 - 7x*6y + (6y)^2)   =

(7x + 6y) ( 49x^2 - 42xy + 36y^2)

you,

mrb

(a + b) (a^2 - a b + b^2)