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Answer:
30 cups
Explanation:
Sarah's target = $50
If her dad gave her $5, then the amount still needed = $50-5=$45
Each cup of lemonade =$1.50
Therefore, x cups =1.50x
Since she needs to raise at least $50, then:
[tex]\begin{gathered} 1.50x\ge45 \\ x\ge\frac{45}{1.50} \\ x\ge30 \end{gathered}[/tex]Sarah needs to sell 30 cups of lemonade to raise at least $50.