Unit 4 Review 8th Grade

Front

What is an inequality?

Back

An inequality is a mathematical statement that compares two expressions, showing that one is less than, greater than, less than or equal to, or greater than or equal to the other.

Front

How do you represent a total cost for multiple items with a fixed fee?

Back

The total cost can be represented as: Total Cost = (Cost per item * Number of items) + Fixed fee.

Front

What is the purpose of using variables in equations?

Back

Variables are used to represent unknown values in equations, allowing us to solve for those values.

Front

How do you solve an inequality?

Back

To solve an inequality, isolate the variable on one side using inverse operations, similar to solving an equation, while reversing the inequality sign when multiplying or dividing by a negative number.

Front

What does it mean for two costs to be equal?

Back

Two costs are equal when the total amount paid for each option is the same, allowing for comparison of different pricing structures.

Front

What is the significance of a one-time fee in cost calculations?

Back

A one-time fee is a fixed cost that does not change with the number of items purchased, affecting the total cost calculation.

Front

How do you write an equation to compare two different pricing plans?

Back

To compare two pricing plans, set their total cost equations equal to each other and solve for the variable.

Front

What is the meaning of 'x' in the context of these problems?

Back

In these problems, 'x' typically represents the number of items (trophies, sandwiches, gigabytes, etc.) being purchased or used.

Front

What is a linear equation?

Back

A linear equation is an equation that makes a straight line when graphed, typically in the form y = mx + b, where m is the slope and b is the y-intercept.

Front

How do you interpret the solution of an equation?

Back

The solution of an equation represents the value(s) of the variable that make the equation true.