Alg 2- Midterm Exam (5th 24-25)

Front

What is interval notation?

Back

Interval notation is a way of writing subsets of the real number line. It uses parentheses and brackets to indicate whether endpoints are included or excluded.

Front

How do you represent the inequality -4 ≤ x < -1 in interval notation?

Back

[-4, -1) means x includes -4 but does not include -1.

Front

What does the notation (a, b) signify in interval notation?

Back

(a, b) indicates that 'a' and 'b' are not included in the interval.

Front

What does the notation [a, b] signify in interval notation?

Back

[a, b] indicates that both 'a' and 'b' are included in the interval.

Front

What does the notation [a, b) signify in interval notation?

Back

[a, b) indicates that 'a' is included in the interval, but 'b' is not.

Front

What does the notation (a, b] signify in interval notation?

Back

(a, b] indicates that 'a' is not included in the interval, but 'b' is.

Front

How do you determine the inequality represented by a number line graph?

Back

Identify the endpoints and whether they are open or closed circles to determine if the endpoints are included or excluded.

Front

What is the simplified form of the expression (-3 + 2i)(1 - 4i)?

Back

5 + 14i.

Front

What is an integer?

Back

An integer is a whole number that can be positive, negative, or zero, but does not include fractions or decimals.

Front

Which of the following is an integer: 4.2, 4, -4.2, 4/3?

Back

4 is the only integer.