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ICE Princess25 [194]
3 years ago
8

What is the solution of the system of equations c+3d=8 and c=4d-6? Show work plz.

Mathematics
1 answer:
Harlamova29_29 [7]3 years ago
6 0
\left\{\begin{array}{ccc}c+3d=8\\c=4d-6\end{array}\right\\\\substitute:\\\\(4d-6)+3d=8\\4d+3d-6=8\ \ \ \ /+6\\7d=14\ \ \ \ /:7\\d=2\\\\c=4\cdot2-6=8-6=2\\\\\left\{\begin{array}{ccc}c=2\\d=2\end{array}\right
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Answer:

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V=\frac{1}{3}Bh\\\\V=\frac{1}{3}(9\pi)(13)\\\\V=39\pi

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