Answer: 1) Final price of the jacket = $40.95
2) x = 50
3) Total number of people is 500
Step-by-step explanation:
since we have given that
1) Original price of jacket = $65.00
Discount rate on jacket = 40%
Discount is given by

So, the price becomes

Rate of sales tax = 5%
Amount of sales tax is given by

Final price of the jacket is given by

2) 
We need to solve for 'x':

Hence, x = 50
3)Number of people who like football = 210
Percent of people who like football = 42%
Let the total number of people be x
According to question,

Hence, total number of people is 500.