the expressión 3+4.5 n can be used to find the total cost un dollars to Buy n pens what is the total cost of 5 pens?

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8 votes

ANSWER

$25.50

Step-by-step explanation

We have to replace n by 5 in the given expression:

$\begin{gathered} 3+4.5n \\ 3+4.5\cdot5=3+22.5=25.5 \end{gathered}$

It costs $25.50 to buy 5 pens

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