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3 years ago

9

If grades are weighted 60% tests, 20% quizzes and 20% final exam... What is your course grade if you have a 75 test average, a 8

0 quiz average and make a 60 on the final

1 answer:

cricket20 [7]3 years ago

6 0

Answer:

73

Step-by-step explanation:

course grade = (75 x 0.6) + (80 x 0.2) + (60 x 0.2)

= 45 + 16 + 12

= 73

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$\Delta_3=\left| \begin{array}{ccc}2&1&13\\1&1&8\\1&2&11\end{array}\right| \\\\\\=\left| \begin{array}{ccc}0&-1&-3\\0&-1&-3\\1&2&11\end{array}\right| \\\\\\=0\\$

$\left\{\begin{array}{ccc}x=\dfrac{\Delta_1}{\Delta}=\dfrac{45}{9}=5\\\\y=\dfrac{\Delta_2}{\Delta}=\dfrac{27}{9}=3\\\\z=\dfrac{\Delta_3}{\Delta}=\dfrac{0}{9}=0\\\end{array}\right.$

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