Question

Find all points having an x-coordinate of 9 whose distance from the point (1,4) is 10.

Answer 1

do you know the formula used to find the distance between 2 points?

Answer 2

D= square root of (x2-x1)^2 + (y2-y1)^2

Answer 3

Use (it does not matter which, but we have to choose one pair) (1,4) to be (x2,y2)
and (x1,y1) is the other point. They give us x1=9. So (8,y1) is the 2nd point.
Can you put these points into the formula?

Answer 4

wouldn't it be (9,10) and (9,-2)??