I GIVE The price of apples at a farm is $3.85 per pound. Which equation can be used to determine c, the total price of n pounds of apples? (5 points)

a
\large c=\frac{3.85}{n}

b
c = 3.85n

c
c = 3.85 + n

d
c = 3.85 − n

it's b. c= 3.85n

yes

step-by-step explanation:

they have to be opposite and reciprocal of eachother.

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)