Unit 5, Part 2 Study Guide

Front

What is a rational number?

Back

A rational number is a number that can be expressed as the quotient or fraction of two integers, where the denominator is not zero. Examples include 1/2, 3, and -4.

Front

What equation represents '5 less than a number is 15'?

Back

The equation is x - 5 = 15.

Front

Back

x = 9.

Front

Which algebraic expression could represent a model with 3x and additional constants?

Back

3x + 4 + 2x + 2 - x - 1.

Front

Back

x = 78.

Front

What is the definition of a repeating decimal?

Back

A repeating decimal is a decimal fraction that eventually repeats the same sequence of digits indefinitely, such as 0.333... or 0.142857142857... .

Front

What is the difference between natural numbers and whole numbers?

Back

Natural numbers are the set of positive integers starting from 1 (1, 2, 3,...), while whole numbers include all natural numbers plus zero (0, 1, 2, 3,...).

Front

What does it mean to solve an equation?

Back

To solve an equation means to find the value(s) of the variable(s) that make the equation true.

Front

What is an algebraic expression?

Back

An algebraic expression is a mathematical phrase that can include numbers, variables, and operation symbols, such as 3x + 4.

Front

What is the purpose of simplifying an expression?

Back

Simplifying an expression makes it easier to work with by reducing it to its simplest form.