I can’t figure this out and I need some help please and thank you

9/2 or 4 1/2 its the 4th one (:

Step-by-step explanation:

4 1/2

Step-by-step explanation:

I just used a calculator because it is fastest, but you can do this by hand if you give the 2 a denom of 1 and turn the 2 1/4 into an improper fraction to cross multiply!

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)

the answer would be  

a.

3: 1

step-by-step explanation: