Mathematics, 18.11.2019 03:31 destinyharris2586
Astore is having a sale on chocolate chips and walnuts. for 3 pounds of chocolate chips and 5 pounds of walnuts, the total cost is $ 15 . for 12 pounds of chocolate chips and 2 pounds of walnuts, the total cost is $ 33 . find the cost for each pound of chocolate chips and each pound of walnuts.
Answers: 1
![\bf \stackrel{\textit{3 lbs of "c"}}{3c}+\stackrel{\textit{5 lbs of "w"}}{5w}~~=~~\stackrel{\textit{costs}}{15} \\\\\\ \stackrel{\textit{12 lbs of "c"}}{12c}+\stackrel{\textit{2 lbs of "w"}}{2w}~~=~~\stackrel{\textit{costs}}{33} \end{cases}\qquad \impliedby \textit{let's use elimination} \\\\[-0.35em] ~\dotfill\\\\ \begin{array}{llccccccl} 3c+5w=15&\times (-4)\implies &-12c&+&-20w&=&-60\\ 12c+2w=33&&12c&+&2w&=&33\\ \cline{3-7}\\ &&0&&-18w&=&-27 \end{array}](/tpl/images/0378/9509/dcf40.png)
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Astore is having a sale on chocolate chips and walnuts. for 3 pounds of chocolate chips and 5 pounds...
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