sandra makes necklaces and sells them at a school craft fair. she uses the equation $p = 7.5n-(2.25n + 15)$…

sandra makes necklaces and sells them at a school craft fair. she uses the equation $p = 7.5n-(2.25n + 15)$ to determine her total profit, in dollars, at the fair when $n$ necklaces are sold. based on this equation, how much does she charge for each necklace? (a) $2.25 (b) $7.50 (c) $15.00 (d) $17.25 (after answering the question, turn the page for more information.)

sandra makes necklaces and sells them at a school craft fair. she uses the equation $p = 7.5n-(2.25n + 15)$ to determine her total profit, in dollars, at the fair when $n$ necklaces are sold. based on this equation, how much does she charge for each necklace? (a) $2.25 (b) $7.50 (c) $15.00 (d) $17.25 (after answering the question, turn the page for more information.)

Answer

Answer:

B. $7.50

Explanation:

Step1: Analyze profit - cost formula

The profit formula is $P = 7.5n-(2.25n + 15)$. The total revenue from selling $n$ necklaces is the first - part of the expression before the subtraction. In a profit formula $P=R - C$ (where $R$ is revenue and $C$ is cost), the coefficient of $n$ in the revenue part gives the price per unit. Here, the revenue from selling $n$ necklaces is $7.5n$, so the price per necklace is $7.50$.