Hot dog buns come in packages of 12. Which of the following is not needed to find out how much you will spend on hot dog buns? A - The cost of one pack of buns

B - The cost of the hot dogs

C - The number of buns you need

D - All of the information is necessary

b the cost of hot dogs

do it by oder of elmanation you need the cost of one pack of buns and you need the number of buns you will need but you do not need the cost of hot dogs

the answer is ! ?

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)