MTH 119 — Spring — 2005
Essex County College — Division of Mathematics
Quiz # 21— January 25, 2005
Name:
Signature:
Show all work clearly and in order, and box your final answers. Justify your answers algebraically
whenever possible. You have 20 minutes to take this 10 point quiz. When you do use your
calculator, sketch all relevant graphs and write down all relevant mathematics.
1. Find the product.
123
−250·
231
−1−3−1
−212
=
2. Find the inverse of A=
1−1 0
1 0 −1
6−2−3
.
1This document was prepared by Ron Bannon using L
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