Answer to Question #319645 in Microeconomics for Bea

Question #319645

If 𝑥 is the number of pens you buy and 𝑦 is the price of each pen, write an equation expressing the total cost (𝑍) when buying pens.

[1] 𝑍 = (𝑥 + 𝑦)

[2] 𝑍 = 𝑥𝑦2

[3] 𝑍 = 𝑥𝑦

[4] 𝑍 = 𝑥 ÷ y

Expert's answer

[3] 𝑍 = 𝑥𝑦

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