Unit 4 Review

Absolute Value can only be positive

Another name for this is "magnitude"

You will know absolute value when you see a number in between two lines like |x|

Absolute Value tracks a number's distance from 0

When you take one number and multiply it by 2 other numbers

It will look like

• M x (A+B) OR M x (A-B)

• (M x A) + (M x B) OR (M x A) - (M X B)

A variable is used when we do not know what the value is.

When we know the value, we substitute the variable for the value

When a number and a variable are next to each other like 3x, that means multiplication

An expression is a math sentence with no equal sign

It has numbers, an operation sign, and it might even include a variable