If ∠a and ∠b are vertical angles, and ∠a = 33°, find ∠b.
a. 33°
b. 66°
c. 57°
d. 147°

The rows and columns of lattice points in a three-by-three square array are evenly spaced one unit apart. how many distinct triangles with at least one side of length 2 units can be drawn using three lattice points for the vertices?

Select the correct answer. joshua likes to read. he read 6 books when he was 6 years old. every year he doubled the number of books he read the previous year. how many total books did he read between the ages of 6 and 10? a. 60 b. 90 c.186 d.187

Simplify the expression 10/11(22z) + (a+5) -1