options: Understand addition as putting together and adding to, and understand subtraction as taking apart and taking from.

Solve systems of equations.

Write and interpret numerical expressions.

Write expressions in equivalent forms to solve problems.

Perform arithmetic operations on polynomials.

Multiply and divide within 100.

Understand properties of multiplication and the relationship between multiplication and division.

Analyze patterns and relationships.

Create equations that describe numbers or relationships

Represent and solve problems involving multiplication and division.

Solve equations and inequalities in one variable.

Apply and extend previous understandings of arithmetic to algebraic expressions.

Use polynomial identities to solve problems.

Represent and solve equations and inequalities graphically.

Work with addition and subtraction equations.

Understand the connections between proportional relationships, lines, and linear equations.

Use the four operations with whole numbers to solve problems.

Solve real-life and mathematical problems using numerical and algebraic expressions and equations.

Generate and analyze patterns.

Analyze and solve linear equations and pairs of simultaneous linear equations.

Work with equal groups of objects to gain foundations for multiplication.

Represent and solve problems involving addition and subtraction.

Add and subtract within 20.

Understand and apply properties of operations and the relationship between addition and subtraction.

Solve problems involving the four operations, and identify and explain patterns in arithmetic.

Use properties of operations to generate equivalent expressions.

Represent and analyze quantitative relationships between dependent and independent variables.

Interpret the structure of expressions.

Rewrite rational expressions.

Understand solving equations as a process of reasoning and explain the reasoning.

Work with radicals and integer exponents.

Reason about and solve one-variable equations and inequalities.

Gain familiarity with factors and multiples.

Understand the relationship between zeros and factors of polynomials.
problem_activity: Task
DVDs can be made in a factory in New Mexico at the rate of 20
DVDs per \$3, but the factory costs \$80,000 to build.
If they make 1 million DVDs, what is the unit cost per
DVD?
DVDs can be made in a factory in Colorado at the rate of 10
DVDs per \$1.50, but the factory costs \$100,000 to build.
If they make 1 million DVDs, what is the unit cost per
DVD?
How much can a buyer save on a million DVDs by buying
DVDs from  New Mexico instead of DVDs from Colorado?
Find an equation for the cost of making $x$ number of DVDs
in the factory in New Mexico.
Find an equation for the cost of making $x$ number of DVDs
in the factory in Colorado.


correct_option_index: 15