Question 235037
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Let *[tex \Large x] represent the cost of a tablet.  Let *[tex \Large y] represent the cost of a pen.


Then


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ 7x\ +\ 4y\ =\ 6.40]



*[tex \LARGE \ \ \ \ \ \ \ \ \ \ 2x\ +\ 19y\ =\ 5.40]


Solve the system. *[tex \Large x] will be the price of a tablet, and *[tex \Large y] will be the price of a pen.



John
*[tex \LARGE e^{i\pi} + 1 = 0]
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