Solve sec^2 (x) < tan^2 (x) + sec(x) over 0 to 2pi

Mary had at least an 80% on her test write an inequality to represent this situation

Use the diagonals to determine whether a parallelogram with vertices u(2,−2), v(9,−2), w(9,−6), and x(2,−6) is a rectangle, rhombus, or square. give all the names that apply.

Which function has the same domain as y=2x