I will give brainiest to whoever answers correctly !! Please do not steal my points I'm tired of it put a legit answer or leave

Which matrix can be multiplied to the left of a vector matrix to get a new vector matrix ?

The angle of a triangle are given as 6x,(x-3), and (3x+7). find x then find the measures of the angles

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 ?