review. order of operations using a calculator algebra graphing conversions metric system weighted...
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Review
Review
Order of Operations Using a calculator Algebra Graphing Conversions Metric System Weighted Average
Order of Operations
Please Parenthesis Excuse Exponents My Multiplication Dear Division Aunt Addition Sally Subtraction
Using a Calculator
Calculators only do what they are told, they are not psychic
Calculators are programmed to follow Order of Operations
Calculator Example
Type this into your calculator: 5*10^2/1*10^3 = 500000 5*10^2/(1*10^3) = 0.5
??10*1
10*53
2
Calculator Example
E function (EE) Computer language for (^10x) Don’t need parenthesis 5E2/1E3 = 0.5
??10*1
10*53
2
Algebra
Basic branch of math involved with solving equations with variables
Basic Rule: whatever you do to one side of an equation, do the same to the other side
X – 5 = 7 +5 +5 X =12
Graphing
Always label axes Always have Title Take up most of
page Appropriate scale
X-axis
Y-a
xis
Title
Any of these Correct?
X-axis
Title
Y-a
xis
X-axis
Title
Y-a
xis
Appropriate Scale
All increments have to be EQUAL
XXX XXX X
Y
Y
Y
Y
Appropriate Scale??
XXXXX X
Y
Y
Y
Y
All increments have to be EQUAL
Conversions
Multiplying any quantity by 1 doesn’t change the original quantity
5 x 1 = 5
5 x 2/2 = 10/2 = 5
5kg x 1000g/1kg = 5000g
Conversion Factors
Quantity equal to 1 but relates two different measurements
1kg = 1000g
12in = 1ft
g
kg
1000
1
ft
in
1
12
Metric System
System of measurement based on factors of 10
Metric System Conversions
Two ways Multiply by a conversion factor Use a table
Metric System Conversion
cmm
cmm 100
1
100*1
Metric System Table
103 102 101 100 10-1 10-2 10-3
kilo m, L, g deci centi milli
k d c m
Number
Prefix
Symbol
Power of 10
Base Unit
1kg ??g
103 102 101 100 10-1 10-2 10-3
kilo gram deci centi milli
kg g dg cg mg
1. 0 0 0Number
Prefix
Symbol
Power of 10
1kg 1000g
103 102 101 100 10-1 10-2 10-3
kilo gram deci centi milli
kg g dg cg mg
1 0 0 0.Number
Prefix
Symbol
Power of 10
10mL ??L
103 102 101 100 10-1 10-2 10-3
kilo Liter deci centi milli
kL L dL cL mL
0 0 0 1 0.Number
Prefix
Symbol
Power of 10
10mL 0.01L
103 102 101 100 10-1 10-2 10-3
kilo Liter deci centi milli
kL L dL cL mL
0. 0 1 0Number
Prefix
Symbol
Power of 10
Weighted Average
Average where all numbers are not equally weighted
Must take into account weight of each number Example: Your Grade
Example
HW(30%) 100 Labs(20%) 90 Test(50%) 85
Grade = .3*100+.2*90+.5*85=90.5
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