Question

10. The value of ‘k’ if the distance between (2, k) and (-1,7) is 5. A) 6 B) 3 C) 1 ShD) 9 11. If AC = AB + BC, then the points are​ (fast please)

Answer 1

Answer:

Step-by-step explanation:

distance formula=√$(x_{2} -x_1)^{2} +(y_2-y_1)^2$

here (2,k) and (-1,7)

         $x_1=2\\y_1=k\\x_2=-1\\y_2=7$

=√(-1-2)²+(7-k)²

=√(-3)²+7²-k²

=√(-3+7-k)² , Therefore square and root are cancelled

=-3+7-k

=4-k

k=4