Please help i really need to know how to solve 11 and 12. were solving each equation for y in terms of x

For what values of x is x2 + 2x = 24 true?

Aquadrilateral has exactly one pair of parallel sides. which name best describes the figure?

15. 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{ {