Precalculus Chapter 0 Pretest

True or false: If M is the set of natural number multiples of 3 that are less than 39, then 12 ∈ M.

• True

• False

Let B = {6, 7, 8, 9, 10} and C = {3, 6, 9, 12}. Find B ∪ C. Write your answer in set notation.

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Simplify: (6 + 2i) - (-3 + 7i)

• 9 - 5i
• -1 + 9i
• 12 - 3i
• 3 + 5i

For g(x) = 3x² - 4x + 2, does it open up or down?

• Up

• Down

• Neither

• Both

For g(x) = 2x² - 4x + 3, what is its vertex (give coordinates of point)?

For g(x) = 2x² - 4x + 3, what is its range?

Simplify: ³√27x⁶y⁹

Solve the system. Write your answer as the coordinates of a point.

5x + y = 2

x - y = 22

Using the data set {4, 4, 5, 5, 5, 6}, find the mode.

• 4

• 5

• 6

• No mode

Using the data set {2, 2, 2, 3, 3, 4}, what is the relative frequency of the number 2?

• 0.5

• 0.33

• 0.67

• 0.17