Andre received $60 for his birthday and put it in his piggy bank. Each week, he puts 3 more dollars in his bank. The amount of money in dollars, \( D \), in his bank is given by \( D = 3w + 60 \), where \( w \) is the number of weeks he has saved 3 dollars.
His sister Lana makes a table of reasonable values for \( w \). Lana selects 42 as a value for \( w \). What is the corresponding table entry for \( D \)?
(Teacher Hint: They are asking what \( D \) will be if \( w \) is 42.)
Answer (3)
D = 3 ⋅ 42 + 60 D = 126 + 60 D = 186
186 ;
After 42 weeks, the amount of money Andre has in his piggy bank is $186. This is calculated using the formula D = 3 w + 60 . By substituting w with 42, we find D = 186 .
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