Simplify the expression

An explanation would be greatly appreciated

Find the value of tan theta if sin theta = 12/13 and theta is in quadrant 2

An appliance store sells lamps at $95.00 for two. a department store sells similar lamps at 5 for $250.00. which store sells at a better rate

Pepe and leo deposits money into their savings account at the end of the month the table shows the account balances. if there pattern of savings continue and neither earns interest nor withdraw any of the money , how will the balance compare after a very long time ?