Abutterfly can fly 82 feet in 4 seconds. a dragon can fly 50 feet in 2 seconds. which can fly faster and by how much?

Step-by-step explanation: If a butterfly flies 82 feet in 4 seconds, it will fly 41 feet in 2 seconds. A dragonfly flies 50 feet in 2 seconds, so that makes it faster than the butterfly by 9 feet per 2 seconds, or 4.5 feet per second.  

step-by-step explanation:

hello from mrbilldoesmath!

answer:

(7 x + 6 y) (49 x^2 - 42 x y + 36 y^2)

discussion:

the trick is to recognize that 343 = 7^3 and 216 = 6^3 and, in general,

a^3 + b^3 =   (a + b) (a^2 - a b + b^2).

in our case

343x^3+216y^3   =   (7x)^3 + (6y)^3

so take a = 7x and b = 6y in the above equation to get the answer.

you,

mrb