# ACT67c Math Answer Explanations

### 2009 June(67C) Math Question 1

Word Problems

- 2 Variable Addition

### 2009 June(67C) Math Question 2

Algebraic & Function Expressions

- Solve Algebraic Expressions

### 2009 June(67C) Math Question 3

Ratios, Proportions, Percentages, Fractions

- Proportions & Ratios

### 2009 June(67C) Math Question 4

Statistics

- Mean, Median

### 2009 June(67C) Math Question 5

Word Problems

- 1 Variable Equations

### 2009 June(67C) Math Question 6

Algebraic & Function Expressions

- Write Algebraic Expressions

### 2009 June(67C) Math Question 7

Algebraic & Function Expressions

- Solve Algebraic Expressions

### 2009 June(67C) Math Question 8

Word Problems

- Cost

- FOIL

### 2009 June(67C) Math Question 10

Perimeter, Area, Volume

- Triangles, Squares, Rectangles, Circles

### 2009 June(67C) Math Question 11

Angles

- Collinear Points & Triangles

### 2009 June(67C) Math Question 12

Probability

- Combinations

### 2009 June(67C) Math Question 13

Sequences and Patterns

- General Sequences

### 2009 June(67C) Math Question 14

Algebraic & Function Expressions

- Solve Function Expressions

### 2009 June(67C) Math Question 15

Exponents, Radicals, & Scientific Notation

- Exponent Expressions

### 2009 June(67C) Math Question 16

Ratios, Proportions, Percentages, Fractions

- LCM, GCF, Prime Numbers

### 2009 June(67C) Math Question 17

Perimeter, Area, Volume

- Other Shapes

### 2009 June(67C) Math Question 18

Sequences and Patterns

- General Sequences

### 2009 June(67C) Math Question 19

Algebraic & Function Expressions

- Solve Function Expressions

### 2009 June(67C) Math Question 20

Perimeter, Area, Volume

- Mixed Shapes

### 2009 June(67C) Math Question 21

Algebraic & Function Expressions

- Simplify Algebraic Expressions

### 2009 June(67C) Math Question 22

Trigonometry

- Pythagorean Theorem & sin cos tan

### 2009 June(67C) Math Question 23

Sequences and Patterns

- General Sequences

### 2009 June(67C) Math Question 24

Equation of a Line

- Equations that Describe a Line

### 2009 June(67C) Math Question 25

Exponents, Radicals, & Scientific Notation

- Exponent Expressions

### 2009 June(67C) Math Question 26

Absolute Values

- Absolute Value Expressions

### 2009 June(67C) Math Question 27

Trigonometry

- Pythagorean Theorem & sin cos tan

### 2009 June(67C) Math Question 28

Algebraic & Function Expressions

- Write Function Expressions

### 2009 June(67C) Math Question 29

Inequalities

- Inequality Expressions

### 2009 June(67C) Math Question 30

Perimeter, Area, Volume

- Triangles, Squares, Rectangles, Circles

### 2009 June(67C) Math Question 31

Trigonometry

- Pythagorean Theorem & sin cos tan

Probability

- One Event

### 2009 June(67C) Math Question 33

Graphing Properties

- Interpret Graphs or Figures

### 2009 June(67C) Math Question 34

Equation of a Line

- Equations that Describe a Line

### 2009 June(67C) Math Question 35

Ratios, Proportions, Percentages, Fractions

- Proportions & Ratios

Conics

- Circles

### 2009 June(67C) Math Question 37

Perimeter, Area, Volume

- Mixed Shapes

### 2009 June(67C) Math Question 38

Perimeter, Area, Volume

- Mixed Shapes

### 2009 June(67C) Math Question 39

Equation of a Line

- Distance & Midpoint

### 2009 June(67C) Math Question 40

Perimeter, Area, Volume

- Triangles, Squares, Rectangles, Circles

### 2009 June(67C) Math Question 41

Algebraic & Function Expressions

- Systems of Equations

### 2009 June(67C) Math Question 42

Trigonometry

- Pythagorean Theorem & sin cos tan

### 2009 June(67C) Math Question 43

Graphing Properties

- Interpret Graphs or Figures

### 2009 June(67C) Math Question 44

Graphing Properties

- Reflection, Rotation, Symmetry, Translation

### 2009 June(67C) Math Question 45

Perimeter, Area, Volume

- Triangles, Squares, Rectangles, Circles

### 2009 June(67C) Math Question 46

Perimeter, Area, Volume

- Triangles, Squares, Rectangles, Circles

### 2009 June(67C) Math Question 47

Angles

- Parallel Lines

Angles

- Circles

### 2009 June(67C) Math Question 49

Algebraic & Function Expressions

- Systems of Equations

### 2009 June(67C) Math Question 50

Graphing Properties

- Interpret Graphs or Figures

### 2009 June(67C) Math Question 51

Word Problems

- Cost

### 2009 June(67C) Math Question 52

Graphing Properties

- Interpret Graphs or Figures

### 2009 June(67C) Math Question 53

Matrices

- Determinants

### 2009 June(67C) Math Question 54

Equation of a Line

- Interpret Graphs or Figures

### 2009 June(67C) Math Question 55

Inequalities

- Inequality Expressions

### 2009 June(67C) Math Question 56

Perimeter, Area, Volume

- Mixed Shapes

### 2009 June(67C) Math Question 57

Trigonometry

- Advanced sin, cos, tan functions

### 2009 June(67C) Math Question 58

Sequences and Patterns

- Arithmetic Sequences