s1871407
16.05.2021 •
Mathematics
Tom has taken 5 of the 8 equally weighted tests in his U.S. History class
this semester, and he has an average score of exactly 78.0 points. How
many points does he need to earn on the 6th test, to bring his average
score up to exactly 80.0 points?
Solved
Show answers
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Ответ:
Step-by-step explanation:
Let's simplify step-by-step.
(k+1)(x2)−8kx+3k+5
Distribute:
=(k)(x2)+(1)(x2)+−8kx+3k+5
=kx2+x2+−8kx+3k+5
=kx2−8kx+x2+3k+5