Here is Tylers strategy to find 15.28 – 8.73 . First, I add 0.27 to 8.73, then I add 6 more and 0.28 more. Explain why Tylers method works and use it to find the difference of 15.28 – 8.73

15.28 - 8.73 = 6.55

Step-by-step explanation:

Given - Here is Tylers strategy to find 15.28 – 8.73 . First, I add 0.27 to 8.73, then I add 6 more and 0.28 more.

To find - Explain why Tylers method works and use it to find the difference of 15.28 – 8.73

Proof -

If we add 0.27 to 8.73 , we get

8.73 + 0.27 = 9

Then add 6, we get

9 + 6 = 15

Then add 0.28 we get

15 + 0.28 = 15.28

As after adding 0.27 and 6 and 0.28 more to 8.73 gives the value 15.28.

So,

Tylers method works

Now,

By using Tylers method , we get

15.28 - 8.73 = 0.27 + 6 + 0.28

                    = 6.55

i.e. we get

15.28 - 8.73 = 6.55

if the eqn of the parabola is f(x) = (x-4)(x+2), we need to mult. this out to find the coordinates of the vertex.

then f(x) = x^2 + 2x - 4x - 8, and f(x) = x^2 - 2x - 8.

one way in which you can find the vertex is to calculate x = -b / (2a).   here, that comes to

        )

x = = 1.   f(1) = 1^2 - 2(1) - 8 = - 9.   vertex is at (1, -9).

        2(1) 

find another point on the curve:   let x=0, for which y=-8.   then (0, -8) is on the curve.   plot the vertex and this point and draw a smooth parabola thru both.

hope this

there is no grid

step-by-step explanation: