Circle O is shown. Tangents X Z and Y Z intersect at point Z outside of the circle. The first arc formed is arc b, and the second arc formed is arc a. Which equation is correct regarding the diagram of circle O? m∠XZY = One-half(a + b) m∠XZY = One-half(a – b) m∠XOY = One-half(a + b) m∠XOY = One-half(a – b)

Delbert keeps track of total of the total number of points he earns on homework assignments, each of which is worth 60 points. at the end of the semester he has 810 points. write an equation for delbert’s average homework score a in terms of the number of assignments n.

Does the construction demonstrate how to copy an angle correctly using technology a) yes the distance between points a and f was used to create circle h b) yes the distance between points f and g was used to create circle h c) no the distance between points a and f was used to create circle h d) no the distance between points f and g was used to create circle h

Triangles abd and ace are similar right triangles. witch ratio best explains why the slope of ab is the same as the slope of ac?