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

i think the answer is .36

step-by-step explanation:

what i did was only 2.88 divided by 8

all three statements are true

step-by-step explanation:

a shipping fee of 5% is charged online with every item purchased online

first let's just take each option and calculate them based on this, to see if the answers matched

keith buys a 40 dollar book

40 x 0.05 = 2

therefore there will be a two dollar fee on keith's book

40 + 2 =42

the first statement is true

a chair costs $80

80 x 0.05 = 4

80 + 4 = 84

the second statement is true

george buys a 20 dollar calculator

20 x 0.05 = 1

20 + 1 = 21

the third statements are true

all three statements are true