genyjoannerubiera
10.09.2019 •
Mathematics
The teachers’ editions of a statistics textbook sell for $150 each, and students’ editions of the book sell for $50 each. which function can be used to find the average cost per book if two teachers’ editions and x students’ editions are purchased?
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Ответ:
(300 + 50x)/(2 + x)
Step-by-step explanation:
Let the cost of teachers' edition books be t
Let the cost of students' edition books be s
So t = 150; s = 50
Then the total cost of 2 teachers' editions and x students' editions is 2t + sx = 2 × 150 + 50x = 300 + 50x.
The total number of books is 2 + x.
So the average cost per book is (300 + 50x)/(2 + x)
Ответ:
the answer is D.
Step-by-step explanation:
Ответ:
hope this helps