Help with a easy thing

At a sale this week, a desk is being sold for $213. this is a 29% discount from the original price. what is the original price?

Which of these sequences is a geometric sequence a 1,2,4, 7, 11, 16, 22. b. 2.4.8.14.22.38 c.3.6.9. 15.18,21 d. 3,9,27,81,243,729,

Find the value of x for which line a is parallel to line b