Mod 2 Real # Review

Front

What is an irrational number?

Back

An irrational number is a number that cannot be expressed as a fraction of two integers. Its decimal representation is non-terminating and non-repeating.

Front

Identify an example of an irrational number.

Back

5.72314..... is an example of an irrational number.

Front

What is the formula to find the area of a square?

Back

The area of a square is calculated using the formula: Area = side × side or Area = side².

Front

If the area of a square is 81 cm², what is the length of one side?

Back

The length of one side is 9 cm.

Front

How do you convert a repeating decimal to a fraction?

Back

To convert a repeating decimal to a fraction, let x equal the decimal, multiply by a power of 10 to shift the decimal point, and then solve for x.

Front

Convert 0.252525... to a fraction.

Back

0.252525... = \frac{25}{99}.

Front

What is a rational number?

Back

A rational number is any number that can be expressed as a ratio of two integers (a fraction).

Front

How can you tell if a number is rational?

Back

A number is rational if it can be written as a ratio of two integers.

Front

What does the equation x² = 25 represent?

Back

The equation x² = 25 represents a quadratic equation with two solutions: x = 5 and x = -5.

Front

What are the solutions to the equation x² = 25?

Back

The solutions are 5 and -5.