Question

if the distance between the points (a,3) and (8,3) is 7 units find the value of a​

Answer 1

Answer:

distance formula

$\sqrt{(x2 - x1) {}^{2} } + \sqrt{(y2 - y1) {}^{2} }$

7=√(8-a)^2 +√(3-3)^2

7=√64-a^2+0

49-64=-a^2

-15=a^2

a=√15