Absolute Value

Absolute Value: of a number x is its distance from zero. It is wwritten as (x). It is always a nonnegative number, and is only zero when x= 0. For Example:
(15) =15 (-15) = 15 (0)=0




Please note the parenthesis should be straight bars.

Geometric Definitions

Area: refers to the amount of space inside a two-dimensional fiqure, like a square or a triangle.
You can think of area as the amount of paint needed to paint a wall.
Surface Area: refers to three-dimensional figures; it is the amount of space inside each surface, or face, of a three-dimensional fiqure. You can think of surface area as the amount of paint required to fill an entire room with paint.
Volume: refers to the amount of space contained inside the fiqure. You can think of volume as the amount of paint required to fill an entire th paint.

Solving Equations: Two Steps

Solving Equations
Two Steps equations require two steps to solve. When solving equations, we use REVERSE
order of operations: For Example: 3x+ 5=-1
We are multiplying x by 3 and adding 5. We need to reverse this and do the opposite to find our answer. To undo the adding 5, we subtract 5. Then to undo the multiplying by 3, we divide by 3. 3x +5 =-1
-5 =-5 Subtract 5 from each side
3x = -6 Divide each side by 3

x =-2

Solving Equations

Solving Equations

One Step Equations usually involve addition. subtraction, multiplication or division.
The key is to undo everything using the opposite operation. For example:
x+50 = 100 subrtract 50 from both sides
-50 =-50
x =50

Basic Probability

Basic Probability

Probabilities are expressed as fractions or decimals.



Question: If you tossed a coin, what is the probability that it would land on heads?

the number of ways an event can occur
the number of total possibilities

either heads OR tails =
two

1/2 = 0.50