4y = 8.4 what is the value of y?
also pls include an explanation for this along with a check ( a sentence to check the answer ) and property ( commutative, associative, distributive, or identity ) ;-; ill give 5 stars and a thanks

2.1

Step-by-step explanation:

You divide 8.4 by 4 hope this helps

Work Shown:

4y = 8.4

4y/4 = 8.4/4   divide both sides by 4; division property of equality

y = 2.1

Check:

4y = 8.4

4*2.1 = 8.4 replace y with 2.1

8.4 = 8.4

We end up with a true equation, as we get the same number on both sides, so we've confirmed the answer.

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)

i would say true? if the unit was informational and it "refreshed your understanding", then true.