Semester Review 1: 1.1 - 1.4

Front

What is the absolute value of |x|?

Back

The absolute value of a number x is its distance from 0 on the number line, regardless of direction. For example, |8| = 8 and |-8| = 8.

Front

What is the opposite of a number?

Back

The opposite of a number x is -x. For example, the opposite of 67 is -67.

Front

Evaluate the expression: 3 + 4.

Back

The result is 7.

Front

What is the value of 2^4?

Back

2^4 = 16.

Front

What does it mean to evaluate an expression?

Back

To evaluate an expression means to calculate its value by substituting variables with numbers.

Front

What is the definition of an integer?

Back

An integer is a whole number that can be positive, negative, or zero.

Front

What is the formula for finding the absolute value of a number?

Back

The absolute value of a number x is defined as: |x| = x if x >= 0, and |x| = -x if x < 0.

Front

If x = 5, what is the value of x + 7?

Back

If x = 5, then x + 7 = 12.

Front

What is the result of | -4 | + | -1 |?

Back

The result is 5, since |-4| = 4 and |-1| = 1.

Front

What is the definition of a rational number?

Back

A rational number is any number that can be expressed as a fraction a/b, where a and b are integers and b ≠ 0.