Chapter 1 - Foundations for Algebra - 1-7 The Distributive Property - Apply What You've Learned - Page 52: b

$5n+10$, Used the distributive property.

Work Step by Step

The number of plain tiles there are is $n+2$. The cost of each plain tile is 5 dollars. So the price of the plain tiles is $5(n+2)$. Use the distributive property to simplify, and you get $\boxed{5n+10}$

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