In the past year, Hans watched 38 movies that he thought were very good. He watched 95 movies over the whole year. Of the movies he watched, what percentage did he think were very good?

40%

Step-by-step explanation:

38×100=3800÷95=40

40%×95=38

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