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USPshnik [31]
3 years ago
11

a fireplace contains 46 bricks along its bottom row. if each row above decreases by 4 bricks, what is the function that shows th

e bricks on the 12th row
Mathematics
2 answers:
andrew-mc [135]3 years ago
5 0
In the 12th row there is 138 bricks
m_a_m_a [10]3 years ago
4 0
\bf n^{th}\textit{ term of an arithmetic sequence}\\\\
a_n=a_1+(n-1)d\qquad 
\begin{cases}
n=n^{th}\ term\\
a_1=\textit{first term's value}\\
d=\textit{common difference}\\
----------\\
a_1=46\\
d=-4\\
n=12
\end{cases}
\\\\\\
a_{12}=46+(12-1)(-4)
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