Question

The distance AB=? Round to the nearest tenth.

Answer 1

well, since we know that

B (-1 , -1) and A (3 , 1), then

`~~~~~~~~~~~~\textit{distance between 2 points} \\\\ B(\stackrel{x_1}{-1}~,~\stackrel{y_1}{-1})\qquad A(\stackrel{x_2}{3}~,~\stackrel{y_2}{1})\qquad \qquad d = √(( x_2- x_1)^2 + ( y_2- y_1)^2) \\\\\\ BA=√([3 - (-1)]^2 + [1 - (-1)]^2)\implies BA=√((3+1)^2+(1+1)^2) \\\\\\ BA=√(4^2+2^2)\implies BA=√(20)\implies BA\approx 4.5`