The equation a = 2(b + b)h can be used to determine the area, a, of a trapezoid with height, h, and base lengths, bu
and by which are equivalent equations? Check all that apply.
20 - b= b 2
-b2 = 1
B
2a-b2 = 1
20_=h
b, + b2
=h
2(b +62)

In pqr the obtuse angle is 105 and the shorter sides measure 4 and 7 units rounded to the nearest tenth what is the area of triangle pqr

Two rigid transformations are used to map abc to qrs. the first is a translation of vertex b to vertex r. what is the second transformation? a reflection across the line containing ab a rotation about point b a reflection across the line containing cb a rotation about point c

Researchers were interested in whether relaxation training decreases the number of headaches a person experiences. they randomly assigned 20 participants to a control group or a relaxation training group and noted the change in number of headaches each group reported from the week before training to the week after training. which statistical analysis should be performed to answer the researchers' question?