Lesson 4
Finding Solutions to Inequalities in Context
Problem 1
The solution to \(5-3x > 35\) is either \(x>\text-10\) or \(\text-10>x\). Which solution is correct? Explain how you know.
Solution
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Problem 2
The school band director determined from past experience that if they charge \(t\) dollars for a ticket to the concert, they can expect attendance of \(1000-50t\). The director used this model to figure out that the ticket price needs to be $8 or greater in order for at least 600 to attend. Do you agree with this claim? Why or why not?
Solution
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Problem 3
Which inequality is true when the value of \(x\) is -3?
\(\text-x -6 < \text-3.5\)
\(\text-x- 6 >3.5\)
\(\text-x -6 > \text-3.5\)
\(x -6 > \text-3.5\)
Solution
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(From Unit 4, Lesson 3.)Problem 4
Draw the solution set for each of the following inequalities.
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\(x\leq5\)
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\(x<\frac52\)
Solution
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(From Unit 4, Lesson 3.)Problem 5
Write three different equations that match the tape diagram.
Solution
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(From Unit 3, Lesson 3.)Problem 6
A baker wants to reduce the amount of sugar in his cake recipes. He decides to reduce the amount used in 1 cake by \(\frac12\) cup. He then uses \(4\frac12\) cups of sugar to bake 6 cakes.
- Describe how the tape diagram represents the story.
- How much sugar was originally in each cake recipe?
Solution
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(From Unit 3, Lesson 2.)