Expressions, Equations and Inequalities

An inverse operation is

• reversing the sign in an inequality
• using the opposite operation to solve equations
•  A number’s distance from zero

Like terms are 

• numbers or same variable raised to the same power
• equal numbers
• only unknown values

One difference between equations and expressions would be...

• you solve both of them using inverse operations.
• you flip the symbol when you multiply or divide by a negative
• equations have an equals because they show two equal expressions. Expresions have terms and operations.

When solving an inequality, what is the main things that are different from solving equations.

• Draw the line
• Use inverse operations to solve.
• Bring down the inequality symbol and FLIP the symbol  when you multiply or divide by a negative.

When solving an inequality, what are the main things that are different from solving equations.

• Draw the line
• Use inverse operations to solve.
• Bring down the inequality symbol and FLIP the symbol  when you multiply or divide by a negative.

Choose an expression that is equivalent to the following
6n + 2(3 - 5n)

• n + 6
• 6 - 4n
• 16n + 6

Choose the first step in solving the following equation.
-3y - 12 = 14

• add 3 from both sides
• add 12 to both sides
• subtract 12 from both sides

0.1( x - 20 ) > 2

• x > 40
• x < 40
• x > 220

Given an equilateral triangle with a side length of 4 + 2y. Find the perimeter.

• (4 + 2y)/ 3
• 4/3  +2y/3
• 3(4 + 2y)

The perimeter of an equilateral triangle is 18y - 6.  What is the length of one side of the triangle?

• 6y - 2
• 54y -18
• 3(18y -6)