How do i solve this linear equation?
21+x=30

Lines p and q intersect. find the value of b. show your work. cite any theorems you use.

Barbara deposited $300 in the bank. if the bank pays her simple interest at the rate of 4 percent per year, how much money will she have in her account at the end of 9 months?

John checked his watch and said that it is thursday, 7 am. what will the day and time be 2006 hours plzzz i will give you 100 points