Mathematics · Inequalities
An elementary school teacher is ordering x workbooks and y sets of flash cards for a math class. The teacher must order at least 20 items, but the total cost of the order must not be over $80. If the workbooks cost $3 each and the flash cards cost $4 per set, which of the following systems of inequalities models this situation?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1x + y ≤ 20 3x + 4y ≥ 80
- 23x + 4y ≤ 20 x + y ≥ 80
- 3x + y ≥ 20 3x + 4y ≥ 80
- 4x + y ≥ 20 3x + 4y ≤ 80✓
Correct answer
x + y ≥ 20 3x + 4y ≤ 80
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