Josie has $47 left on her checking account if she writes a check for$55 what will josie balance

Which of the following expressions is equal to 2x^2+8

Kendra had twice as much money as kareem. kendra later spent $8 and kareem earned $6. by then,the two had the same amount of money. how much money did each have originally?

Pls never taught i’m really confused and i rlly need