## anonymous 5 years ago solve this and show all your work (4,-2) (b,9); d=5squareroot sign5 solve using the distance formula

1. anonymous

Distance $=5 \sqrt{5}$

2. anonymous

Distance Formula $\sqrt{(x_2 -x_1)^2+(y_2 -y_1)^2)}$

3. anonymous

Plug in what you know and set it equal to $5\sqrt {5}$

4. anonymous

i dont understand my book says the answer should be 2,6

5. anonymous

Okay, let work it through... $\sqrt{(4-b)^2+(-2-9)^2}=5\sqrt{5}$

6. anonymous

$\sqrt{(16-8b+b^2)+(-11)^2}=5\sqrt{5}$ (16-8b+b^2)+(-11)^2=125