To subtract means to take away a number from another number to find the difference between them. We model subtracting a positive integer on the number line by moving left. We also model the addition of a negative integer on the number line by moving left. When we compare the number line models for the equations 15 – 5 = 10 and 15 + (-5) = 10, we see that they look the same. 5 and -5 are additive inverses. This shows that subtracting an integer is the same as adding its additive inverse.

step-by-step explanation:

first you will have to convert 3/4 into a decimal

which is .75

then you will have to divide 1.5 by .75

which is 2

no you have to divide

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