What is tan A?
Tan A =

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

We just started the introduction into circles and i have no idea how to do this.

Aclothing store has the sign shown in the shop window. pani sees the sign and wants to buy 3 shirts and 2 pairs of jeans. the cost of each shirt before the discount is $12, and the cost of each pair of jeans is $19 before the discount. write and simplify an expression to find the amount pani pays if a $3 discount is applied to her total