3) x + y=4
how do I solve for y ​

Which is the equation of an ellipse with directrices at x = ±4 and foci at (2, 0) and (−2, 0)?

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.

If the value of cos330°is√3/2 then find cos 165°.