Unit Test — Unit test Answers

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Which angle of rotation is determined by the matrix below?

45°

135°

225°

315°

Which angle of rotation is determined by the matrix below?

30°

60°

120°

300°

Ramone wrote the following matrix equation.Which explains why Ramone’s equation has no solution?

There is no number that when summed with 8 equals 0.

The matrices must be of the same size in order to perform addition or subtraction.

The sum of 8 and –12 is not 3.

The matrices must measure in order to be added together.

Let u = 2i + 3j, v = –i, and w = 5i – 6j. What is the magnitude of 2(u – v + w)?

10.0

13.4

17.1

21.6

The graph below shows the transformation from triangle 1 to triangle 2.Which sequence of steps would transform triangle 1 to triangle 2?

reflect across the y-axis; rotate 180° counterclockwise about the origin

reflect across the x-axis; rotate 270° counterclockwise about the origin

reflect across the y-axis; rotate 90° counterclockwise about the origin

rotate 90° counterclockwise about the origin; rotate 270° counterclockwise about the origin

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