The teachers' edition of a statistics textbook sells for $150, and students' edition 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?

a) f (x) = 150+50x over 1+x

b) f (x) = 150+50x over 2+x

c) f (x) = 300+50x over 1+x

d) f (x) = 300+50x over 2+x

Question

Mathematics

Edgar Campbell

15 September, 05:42

The teachers' edition of a statistics textbook sells for $150, and students' edition 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?

a) f (x) = 150+50x over 1+x

b) f (x) = 150+50x over 2+x

c) f (x) = 300+50x over 1+x

d) f (x) = 300+50x over 2+x

+5

Answers (1)

Know the Answer?

Nora Ferguson · Answer 1

Average =

Sum of all / total number of things

The sum of that would be 300 + 50x

The total number of things would be 2+x

Therefore it is

(300+50x) / 2+x