Question 584818
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If you score greater than 70 on the third test, then obviously the weighted average will be greater than 70, hence the minimum score on the third test in order to reach a weighted average of 60 must be a score less than 70.  That means that the top and middle scores will, in fact, be 70.


So, your weighted average will be:


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ (0.5\ \times\ 70)\ +\ (0.3\ \times\ 70)\ +\ 0.2x]


Where *[tex \LARGE x] is the score on the third test.


Solve


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ 56\ +\ 0.2x\ =\ 60]


for *[tex \LARGE x]


Super Double Plus Extra Credit:  True or False: If the scores on the first two tests had been 75, you could sleep in the day of the test.


John
*[tex \LARGE e^{i\pi} + 1 = 0]
My calculator said it, I believe it, that settles it
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