Which estimation technique will yield a solution that is closest to the actual product of (–21.06)(–30.45)?

In what form is the following linear equation written y=9x+2

Express in the simplest form: (x^2+9x+14/x^2-49) / (3x+6/x^2+x-56)

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{ {