Solve the system of equations.
12x - 5y = –20
y = x +4

x=
y=

For equation 12x -5y= -20

x=5/12y -20/12

y=12/5x + 4

For equation y=x+4

x=y -4

y=x+4

Step-by-step explanation:

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