Christopher is deciding between two different movie streaming sites to subscribe to. Plan A costs $31 per month plus $2 per movie watched. Plan B costs $11 per month
plus $3 per movie watched. Let A represent the monthly cost of Plan A if Christopher
watches x per month, and let B represent the monthly cost of Plan B if Christopher
watches x movies per month. Write an equation for each situation, in terms of x, and
determine the interval of movies watched, x, for which Plan A is cheaper than Plan B.

answer:

a=9

step-by-step explanation: lmk if you need a explanation

step-by-step explanation:

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 median is   36 orr sum like dat

step-by-step explanation: