F(x)= - 1/3 + 13
when the x- value is ( -3)

I'm going to assume the "x" goes after "-1/3"

f(-3) = -1/3(-3) + 13

f(-3) = 1 + 13

f(-3) = 14

Best of Luck!

the total estimated nappy use.=10,500,000

step-by-step explanation:

given that on an average the average baby uses 3528 napkins.

in a particular year 2014, the number of births were 299697 in new south wales.

rounding off the number of births to the nearest hundred thousand we have

no of birtsh = 300000

also rounding off the average usage to nearst thousand we get

average use of a baby = 3500

hence total number of nappy estimated to be used = 3500x300000

= 10,500,000

answer is 10,500,000 nappies