I need help asap. I don’t understand?

Tim open up a new saving account with a $50 deposit and plant to deposit $20 per week into the same account.write an expression to represent the total amount in his savings account.

Look at triangle wxy what is the length (in centimeters) of the side wy of the triangle?

Find a third-degree polynomial equation with rational coefficients that has roots -2 and 6+i