Write down in terms of n an expression of the nth terms?

A. nth term = 4 + (n - 1) -3

B. nth term = -7 + (n - 1) -5

Step-by-step explanation:

A. 4, 1, -2, -5, -8

First term, a = 4

Common difference, d = 1 - 4 = -3

nth term = a + (n-1)d

nth term = 4 + (n - 1) -3

B. -7, -12, -17, -22, - 27

First term, a = -7

Common difference, d = -12 - (-7)

= -12 + 7

= -5

nth terms = a + (n - 1)d

nth term = -7 + (n - 1) -5

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