Exam Review: Circle meanings

A spread sheet organizes data into columns and rows.
Know the ratio of circumference to diameter is always the same.
Circumference divided by diameter is pi, or 3.14

Exam Review: Circle Equations

Some need-to-know equations are
c=πd A=πr2 c=2πr d=2r
c-circumference     d-diameter      A-area     r-radius   π-pi (3.14)

Exam Review: Sectors of a Circle

Sectors of circle graphs are made from central angles. If the sector covers 75% of the graph, the central angle is 25% of 360°, which is 90°. 

Exam Review: Mode

The mode is the value that shows up the most. e.g. 1,1,2,3,4,4,4 (4 is the mode)

Exam Review: Variables

Variables are unknown numbers. They're represented by letters, e.g. n, t, a, etc.

Numerical Coefficient

Numerical Coefficient- A number that multiplies the variable.

e.g. 2t--Variable
|
Numerical Coefficient.

Value and Constant

Value- A known or calculated amount


Constant-A number that does not change and it increases or decreases the value of an expression.

Variables and Expressions

Variable- A letter that represents an unknown number.
e.g. x,a,n

Expression-Any single number or variable, or combination of operations (+,-,x,÷,etc..) including numbers or variables.
e.g. 5, n, 8t, x+1, 2y-7

Number of the Day BEDMAS

7-33÷9
7-27÷9
7-3
4
(Just box the answer at the end)
(33=3x3x3)

Number of the Day #20-25

(My "choice" fraction may be different.)

Today's BEDMAS question

Today's BEDMAS question was:

5x4+2-1x6+3-8÷4
20+2-1x6+3-8÷4
20+2-6+3-8÷4
20+2-6+3-2
22-6+3-2
16+3-2
19-2
17

Math Textbook pg.225

Number 12

I added the numerator, because, that's how you do it. When the fractions have like denominators, you only add the top.

Adding fractions with like denominators

Adding fractions with "like" denominators, means to add fractions with the same bottom number.
And, when you add them up, you only add the numerator, or the top
Example-

Math Textbook

For the textbook I did # 10

Order of Operations

Order of Operations
First it's Brackets
Then it's Exponents
After it's Multiply and Divide
Finally it's Add and Subtract

The question and way to do it is like this

And here's a website about it

Oh, and here is a video