Cheri paid $6.50 for the bunch of grapes with the weight of 2.5 pounds. What is the price per pound?

Mathematics

1 answer:

kotegsom [21]3 years ago

3 0

It would be $2.6 (or $2.60) per pound.

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$\left[\begin{array}{ccc}9&7\\-4&2\end{array}\right] -4M=\left[\begin{array}{ccc}-3&3\\4&-18\end{array}\right]\qquad(*) \\\\M=\left[\begin{array}{ccc}a&b\\c&d\end{array}\right]\to4M=\left[\begin{array}{ccc}4a&4b\\4c&4d\end{array}\right]$

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