Arectangle has a perimeter of 76 cm. its length is 5 more that twice its width. the system of equation below can be use to fine the length, l, and the width, w, of the rectangle 2l+2w=76,l=2w+5

and

Step-by-step explanation:

the perimeter of a rectangle is given by the following equation:

if a rectangle has a perimeter of 76cm and its length  is 5 plus the double of its width we can use a system of equations to find the length , and the width .

For the perimeter of the rectangle

where is its length, and   is its width, 76 is the perimeter of the rectangle in cm.

We know that the lengh of the rectangle is 5 plus the double of its width, writing the equation:

Substituting the equation above in

We got that the rectangle width is w=11cm

Substituting w in the equation

We got that the rectangle length is l=27cm

Verifying the values obtained

with l=27 and w=11

Satisfying the equation

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