HELP PLEASE!! this is geometry 45°-45°-90° and 30°-30°-60° triangles

The table shows the balance of a money market account over time. write a function that represents the balance y(in dollars) after t years.

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?

Delbert keeps track of total of the total number of points he earns on homework assignments, each of which is worth 60 points. at the end of the semester he has 810 points. write an equation for delbert’s average homework score a in terms of the number of assignments n.