Can somebody help please?

1/5 = 2/10

Step-by-step explanation:

you just have to multiply by 2. Since the 1/5 turns into ?/10, you can assume that you multiply the 5 by 2, and whatever you do to the bottom, you do to the top. So you would multiply the 1 by 2 and you would end up with 2/10.

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