Which expression is equivalent to tan^2(a/2)

Which is the graph of the linear equation x – 2y = 6?

Jiovanni is looking in to two different companies that offer study guides for math exams.test prep 101 charges a $5 flat fee and an additional $0.25 per problem.math charges a $2 flat fee and an additional $0.50 per problem.how many prablems would make the costs of the two companies be equal? varibles: equations/eniqualities{ {

What is the value of d? 9d = –5.4 d =