1. a dilation has a scale factor of 4. what term describes this type of dilation?
a. congruent
b. contraction
c. expansion
d. expulsion

2. which of the following scale factors would produce a contraction under a dilation of the original image?
a. 4.5
b. 3.5
c. 0.8
d. 8.0

If a and −a are numbers on the number line, which expression must give the distance between them? a) 0 b) a c) |2a| d) |a|

If the perimeter of the square equals the perimeter of the regular pentagon. each side of a pentagon is 16cm long. how long is each side of the square?

Out of five men and five women, we form a committee consisting of four different people. assuming that each committee of size four is equally likely, find the probabilities of the following events: 1. the committee consists of two men and two women 2. the committee has more women than men. 3. the committee has at least one man. for the remainder of the problem assume that alice and bob are among the ten people being considered. 4. both alice and bob are members of the committee.