Notes and Equations

Variable - a unknown Number

1.) a + 6 = 10
2.) b - 8 = 5
3.) 7 = 3 + d
4.) 5g = 15
5.) 5 = s - 5
6.) 35 = 7k

Integers
Negative number represent values below zero and positive numbers represent values above zero
eg. above and below ground or sea level
1 + (-2) = (-1) is an addition statement
3 - (-4) = is a subtraction statement

Exam Review Notes

Transformations
Translation - slide along a straight line
Rotation - Turn about a fixed point
Reflection - Mirror image

(+,+) Quadrant I
(-,+) Quadrant II
(-,-) Quadrant III
(+,-) Quadrant IV

Experimental Probability - Actually doing the trial
Theoretical Probability - What you expect to happen

Divisible - Means when a number can be divided by another number with no remainder or decimal. A Whole Number

Divisibility Rules
0 - End in zero
1 - all numbers
2 - all even numbers
3 - sum of the digits is 3
4 - divisible by two twice
5 - ends in a zero or a five
6 - divisible by 2 and 3
8 - divisible by 2 quad
9 - sum of the digits is 9
10 - ends in zero

Circle Formulas
c = π d
A = π r²
c = d = 2r
c = 2 π r

More notes

Experimental Probability - The probability of an event occuring based on experimental results


-Chances of somthing happening based on actually doing it

eg: what is the probability of the spinner on red on in 12 chances

Red
2
Green
5
Blue
3
Orange
2
2
-
12
Theoretical Probability - The expected probability of an event occuring
- without doing a expirement what we think will happen

eg. Whats the theoritical probability of getting red
Green Blue Orange Red
1
-
4
25%
1:4

Notes

Probability - Likehood or chance of an event occuring
Determine Probability by making a fraction
Favourable outcomes
--------------------
Possible outcomes
eg. flipping a coin calling heads Heads 1
Heads = -
or tails 2
Outcome - One possible result of a probability expirement
favourable outcome - A successful result in a probability expirement
p(outcome) Is short for saying probability of somthing happening

Order of Operations

Brackets
Exponents
Division
In order from left to right
Multiplication
Addition
In order from left to right
Subtraction
Annie has been asked to calculate 1.7+6÷2 She claims the answer is 3.85 Do you agree? Explain why or why not
I disagree because the answer is 4.7
My calculations :
1.7+6÷2=
1.7+3=
4.7
Put brackets in the following expression to get the largest value as possible. what problem solving stratgy did you use?
3 x 2.8 + 6.4 ÷ 4
3 x (2.8 + 6.4) ÷ 4
3x 9.2 ÷4
27.6÷4
6.9
Create a problem that could be solved using the following expression
2.5 + 1.25 + 5 X 1.6
Joe had friends who owed him money. Steve owed him $2.50. James owed him $1.25. His crew of 5 people, each of them owed him $1.60. All That Joe made $11.75

Example we did in class :










Bed mas game

Test Corrections Question 5

True Or False

Question: A coordinate grid has the followung set in ordered pairs:(-2,-5),(0,-4),(3,0),(4,1),(5,2) ,(6,3). The point (0,4) is out of place

Answer:True

Sorry Cant find any video that fits this Question