Question

Washing powder cost 12.87 for 9 kg. hwo much does 1 kg cost to the nearst cent

Answer 1

hard

Explanation:

I don't know because I have never learnt these things

Answer 2

`1.43`

Explanation:

9kg -------> 12.87

1kg ---------> x

let the unknown number be x

`9 = 12.87 \\ 1 = x \\ use \: \: cross \: \: multipication \\ 9x = 12.87 \\ (9x)/(9) = (12.87)/(9) \\ x = 1.43`