The cost, in dollars, of a one-day car rental is given by c(x) = 31 + 0.18x, where x is the number of miles driven. in this function,
a) $0.18 is the cost per day to rent the car and $31 is the cost per mile.
b) $31 is the cost per day to rent the car and $0.18 is the cost per mile.
c) $18 is the cost per day to rent the car and $0.31 is the cost per mile.
d) $31 is the cost per day to rent the car and $18 is the extra cost for unlimited miles.

m a t h w a y. c o m

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)

doubled

step-by-step explanation:

is the anwser b. (-13)?