Question

(-1,8) and (8,5). this is a coordinate distance wuestion that i rly need help on

Answer 1

Answer:

3$\sqrt{10}$ ≈ 9.45

Step-by-step explanation:

calculate the distance d between the points using the distance formula

d = $\sqrt{(x_{2}-x_{1})^2+(y_{2}-y_{1})^2 }$

with (x₁, y₁ ) = (- 1, 8 ) and (x₂, y₂ ) = (8, 5 )

d = $\sqrt{(8-(-1))^2+(5-8)^2}$

   = $\sqrt{(8+1)^2+(-3)^2}$

   = $\sqrt{9^2+9}$

   = $\sqrt{81+9}$

   = $\sqrt{90}$

   = $\sqrt{9(10)}$

   = $\sqrt{9}$ × $\sqrt{10}$

   = 3$\sqrt{10}$ ← exact value

   ≈ 9.49 ( to 2 dec. places )