The angles of a quadrilateral measure 80°,100°,80°,100° in this order. what kind of quadrilateral has this shape? how do you know?

Describe the possible echelon forms of the standard matrix for a linear transformation t where t: set of real numbers is onto.

Fa bus driver leaves her first stop by 7: 00 a.m., her route will take less than 37 minutes. if she leaves after 7: 00 a.m., she estimates that the same route will take no less than 42 minutes. which inequality represents the time it takes to drive the route, r?

For problems 29 - 31 the graph of a quadratic function y=ax^2 + bx + c is shown. tell whether the discriminant of ax^2 + bx + c = 0 is positive, negative, or zero.