PLEASE HELP NEED ANSWER ASAP!!!

Sole with work in 10 years, the average number of hours of tv watched per week by teenagers dropped from 23.9 to 21.4. find the percent of change.

Find the y-intercept and x-intercept for the equation 5x-3y=60 what is the y-intercept

Aword processing program requires a 7- digit registration code made up of the digits 1,2,4,5,6,7 and 9 each number has to be used and no number can be used mor than once how many codes are possible