Answer:
3
Step-by-step explanation:
Because there is only one table and you are asking for only one answer
No because it would be
if you knew that
ax^2+bx+c was a trinomial square, then the factored form would be
![( \sqrt{a}x+ \sqrt{c})^{2}](https://tex.z-dn.net/?f=%28%20%5Csqrt%7Ba%7Dx%2B%20%5Csqrt%7Bc%7D%29%5E%7B2%7D%20%20)
or
![( \sqrt{a}x- \sqrt{c})^{2}](https://tex.z-dn.net/?f=%28%20%5Csqrt%7Ba%7Dx-%20%5Csqrt%7Bc%7D%29%5E%7B2%7D%20%20)
so
if w^2-9w+81 is perfect square, factored form is either
![( \sqrt{1}x+ \sqrt{81})^{2}](https://tex.z-dn.net/?f=%28%20%5Csqrt%7B1%7Dx%2B%20%5Csqrt%7B81%7D%29%5E%7B2%7D%20%20)
or
![( \sqrt{1}x- \sqrt{81})^{2}](https://tex.z-dn.net/?f=%28%20%5Csqrt%7B1%7Dx-%20%5Csqrt%7B81%7D%29%5E%7B2%7D%20%20)
aka
![( x+9)^{2}](https://tex.z-dn.net/?f=%28%20x%2B9%29%5E%7B2%7D%20%20)
or
expand them
(x+9)^2=x^2+18x+81, wron middle term
(x-9)^2=x^2-18x+81 wrong
so it is not
Answer:
y = - 1/2x + 7
Step-by-step explanation:
Slope = (-4 - - 1)/(1 - - 5) = -3/6 = -1/2
Point: (8,3)
b = 3 - (-1/2)(8)
= 3 + 4 = 7