what is the standard form of the equation of the hyperbola with a Focus at ​(-8​,0) and ​(8​,0); vertices at ​(5​,0) and ​(-5​,0)

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