Answer:

Step-by-step explanation:
We require 2 equations with the repeating digits (63) placed after the decimal point.
let x = 0.636363..... (1) multiply both sides by 100
100x = 63.6363... (2)
Subtract (1) from (2) thus eliminating the repeating digits
99x = 63 ( divide both sides by 99 )
x =
=
← in simplest form
Y = 4/5x - 1 rise over run and when x = 0 y = -1
His friend's would weigh 23.67 grams.Altogether it would be 31.56 grams.