Can you me find the difference of:
1. (7x + 6) - (5x - 4)
2. (5x - 3y) - (x - y)
3. (9x - 4y) - (-5x - 2y)

1) 2x+10 2) 4x-2y 3) 14x-2y

Step-by-step explanation:

1) (7x+6)-(5x-4)=7x-5x+6-(-4)=2x+6+4=2x+10

2) (5x-3y)-(x-y)=5x-x-3y-(-y)=4x-3y+y=4x-2y

3) (9x-4y)-(-5x-2y)=9x-(-5x)-4y-(-2y)=9x+5x-4y+2y=14x-2y

step-by-step explanation:

use pothagarean therom

a^2+b^2=c^2 so first ac

acm is a right triangle because c= 90°

and am (the hypotenuse or c) =16+9 =25

but there is not enough info we need another angle or side length

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