The table below gives the prices for Magic Carpet carpet cleaning
Size of house
Steam clean
Steam clean +
protective finish
One-story
$40
$65
Two-story
$60
$85
4. Huang owns 12 houses that need to have their carpets steam
cleaned with a protective finish before he can rent them out.
Huang pays a total of $840. How many two-story houses
did he clean?
A. 0
B. 2
C. 3
D. 8
E.
9

answer: b

step-by-step explanation: im sorry bro bro but thats not a eqation the human mind can answer and plus im a devil

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)

ιт ιѕ 12 αв

нσρє ι ¢συℓ∂ нєℓρ уα

more i think

hope this !