3/4
Three fourths subtracted from one half is one fourth. One fourth times one half is one eighth.
Answer:

Step-by-step explanation:
Given data
Number of balls= 480
we are told that 50%(half) of the balls are put back every 1
let the number of hours be x
and let the remaining ball be y after x hours
Hence the expression is given as

Answer:
I don't know how to work it out because I have not answered this question
Step-by-step explanation:
(x= -1)(x=6)

brainiest pls