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Algebra
Pregunta

A diner has \( 645 \) napkins. \( 325 \) napkins a...

A diner has \( 645 \) napkins. \( 325 \) napkins are used at lunch. \( 113 \) napkins are used at dinner. Melanie says that \( 325 - 113 = n \) napkins are used in all, and that \( 645 - 212 = r \) napkins are left. Is her answer reasonable? Explain why or why not. 

Part A 

Is her answer reasonable? 

A. No, because at least \( 325 \) napkins are used. So, \( 212 \) is too small a number for \( n \) . 

B. No, because she adds the number of total napkins used to find \( n \) . 

C. No, because she makes an error in her subtraction. 

D. Yes, her answer is reasonable. 

Part \( B \) 

Choose the equations you could use to find the number of napkins that remain after lunch and dinner. \( t \) represents the napkins that remain after lunch and dinner. 

A. \( 325 - 113 = t \) 

B. \( 645 - 438 = t \) 

C. \( 645 - 325 = t\) 

Answer

Solución
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