1. Which property of the real numbers is illustrated by the following statement:

Question

1. Which property of the real numbers is illustrated by the following statement: 6x + 5x
= (6 + 5)x

a) Commutative property of multiplication

b) Associative property of addition

c) Associative property of multiplication

d) Distributive property

3. Fill in the blanks with > or < to make the resulting statement true: 2 __ -9, and -2 (2) __-2(-9)

a) <,<

b) >,>

c) <, >

d) >,<

4) Find the midpoint of the line segment with endpoints (–5, –2) and (7, 6).

a) (1, 2)

b) (2,4)

c) (1, 4)

d) n(2, 2)

5) Give a description of the indicated subset of the plane in terms of
quadrants: {(x, y) | x < 0, y>0}

a) Quadrant I

b) Quadrant II

c) Quadrant III

d) Quadrant IV

6) Indicate whether the set defines a function. If it does, state the domain
and range of the function. {(1, 7), (2, 7), (3, 7), (4, 7)}

a) A function; Domain = {7}; Range = {7}

b) A function; Domain = {7}; Range = {1, 2, 3, 4}

c) A function; Domain = {1, 2, 3, 4}; Range = {7}

d) Not a function

Explanation / Answer

1. d 3. >, < 4. Add (6,0) to the first and subtract it from the second. (1,–2) and (1, 6) Now add 4 to the first and subtract from the second. (1,2) and (1, 2) a. 5. x0 means to the right of the y axis. d. 6. d

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