If a right angles triangle has 3 sides (x, x+1, 5) and then longest side is 5, what is x?

x = 3

The Pythagorean theorem tells you the relationship between the sides is ...

... x² + (x+1)² = 5²

... 2x² +2x +1 = 25

... x(x +1) = 12 . . . . . . subtract 1, divide by 2

We know that 12 = 3·4, so we can match values to the factors in the above equation to get ...

... x = 3

_____

You can solve by factoring, completing the square, graphing, the quadratic formula, or any other means you might devise to find that the solutions to the equation x² +x -12 = 0 are x = -4 and x = 3. In a geometry problem where x is a length, the solution x = -4 is extraneous.

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