A number decreased by 55% is 1575. Find the original number

Which system of linear inequalities is graphed? can somebody pleasssse

Student price tickets to a movie are $1 and non student tickets are $2. 350 tickets are sold and the total amount made is $450. how many non student tickets were sold ? a) 100 b) 150 c) 200 d)250

If you answer 2+2 you will get over 80 points