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Illustrative Math - Algebra 1 - Unit 2- Lesson 23

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21 Questions
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This year, students in the 9th grade are collecting dimes and quarters for a school fundraiser. They are trying to collect more money than the students who were in the 9th grade last year. The students in 9th grade last year collected $143.88.

Using d to represent the number of dimes collected and q to represent the number of quarters, which statement best represents this situation?
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This year, students in the 9th grade are collecting dimes and quarters for a school fundraiser. They are trying to collect more money than the students who were in the 9th grade last year. The students in 9th grade last year collected $143.88.

Using d to represent the number of dimes collected and q to represent the number of quarters, which statement best represents this situation?
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Which inequality is represented by the graph?
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Here are some statistics for the number of minutes it took each of 9 members of the track team to run 1 mile.
  • mean: 7.3
  • median: 7.1
  • standard deviation: 1.1
  • Q1: 6.8
  • Q3: 7.4
When a tenth time is added to the list, the standard deviation increases to 1.5. Is the tenth time likely an outlier? Explain your reasoning.
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Elena is solving this system of equations:

She multiplies the second equation by 2, then subtracts the resulting equation from the first. To her surprise, she gets the equation 0=0.

What is special about this system of equations? Why does she get this result and what does it mean about the solutions? (If you are not sure, try graphing them.)
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Jada has a sleeping bag that is rated for 30o F. This means that if the temperature outside is at least 30o F, Jada will be able to stay warm in her sleeping bag.

Write an inequality that represents the outdoor temperature at which Jada will be able to stay warm in her sleeping bag.
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Jada has a sleeping bag that is rated for 30o F. This means that if the temperature outside is at least 30o F, Jada will be able to stay warm in her sleeping bag.

Write an inequality that represents the outdoor temperature at which a thicker or warmer sleeping bag would be needed to keep Jada warm.
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What is the solution set to this inequality:  6x-20>3(2-x)+6x-2?
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This lesson is from Illustrative Mathematics. Algebra 1, Unit 2, Lesson 23. Internet. Available from https://curriculum.illustrativemathematics.org/HS/teachers/1/2/23/index.html ; accessed 26/July/2021.

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