Remarks
Example 1: You are selling tickets for a play that cost $3 each. You want to sell at least $50 worth. Write and solve an inequality for the minimum number of tickets you must sell.
Example 2: An alloy is a metal that contains combinations of different types of metal. A manufacturing company needs to make an alloy that has nickel content between 43% and 47% (based on mass). The company already has an alloy with 50% nickel and another alloy with 40% nickel. They plan to mix them to make the alloy they need. Find the least and greatest mass (in kg) of a 50% nickel alloy that should be mixed with a 40% nickel alloy to end up with 100 kilograms of an alloy containing the required percentage of nickel.
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Item Type(s):
This benchmark may be assessed using:
MC
,
FR
item(s)
- Clarification :
Students will interpret and/or solve real-world problems involving linear equations or linear inequalities. - Content Limits :
Items may require students to express inequalities on a number line, or to use an inequality for a response.
Items may include compound inequalities presented in written format, graphically, and/or algebraically.
Items will not include the use of interval notation, e.g. (3,∞), or set notation, e.g. { x I x > 3}.
- Stimulus Attributes :
Items must be set in real-world contexts.
Items should use methods that are graphical and/or algebraic.
Graphics should be used in some of these items, as appropriate.
- Test Item #: Sample Item 1
- Question:
The out-of-pocket costs to an employee for health insurance and medical expenses for one year are shown in the table below.
According to the plan outlined in the table, total annual health care costs, C, depend on the employee’s medical expenses for that year. If x represents the total medical expenses of an employee on this plan and x 500, which of the following equations can be used to determine this employee’s total health care costs for that year?
- Difficulty: N/A
- Type: MC: Multiple Choice
- Test Item #: Sample Item 2
- Question:
Karen works as a salesperson for a local marketing company. Using the equations shown below, the company calculates her monthly earnings based upon her total sales for the month.
Karen’s total sales were greater than $5,000 in October. If her total monthly earnings for October were $3,000, what was the value of her total monthly sales, s ?
- Difficulty: N/A
- Type: FR: Fill-in Response
Related Access Points
Related Resources
Lesson Plan
Problem-Solving Task
Professional Development
Video/Audio/Animation
Student Resources
Video/Audio/Animation
This video demonstrates writing a function that represents a real-life scenario.
Type: Video/Audio/Animation