Mrs. Van Sant is using 1 scoop of lemonade mix for every 2 liters of water to make some lemonade. She is having a party and want
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We know that
• The new charge was $0.50 to mail a letter weighing up to 1 ounce, and $0.21 for each additional ounce.
Based on the given information, the expression is
Where <em>x</em> represents additional ounces, and <em>y</em> represents a cost.
<h2>Hence, the function is</h2>