SOLUTION: The abcissa of a point is -4 and its distance from (2,4) is square root of 72. Find the ordinate

Algebra ->  Length-and-distance -> SOLUTION: The abcissa of a point is -4 and its distance from (2,4) is square root of 72. Find the ordinate       Log On


   

Question 1203017: The abcissa of a point is -4 and its distance from (2,4) is square root of 72. Find the ordinate
Found 2 solutions by josgarithmetic, greenestamps:
Answer by josgarithmetic(39620) About Me  (Show Source):
You can put this solution on YOUR website!
Meaning is some point (-4,y) is sqrt%2872%29 distance from the point (2,4).


You know what to do now? (hint: Distance Formula)

Answer by greenestamps(13200) About Me  (Show Source):
You can put this solution on YOUR website!


abscissa (not abcissa) = x coordinate; ordinate = y coordinate

The two points are (2,4) and (-4,y). By the distance formula...

%282-%28-4%29%29%5E2%2B%284-y%29%5E2=72
6%5E2%2B%284-y%29%5E2=72
%284-y%29%5E2=36
4-y=6 or 4-y=-6

y=-2 or y=10

ANSWERS: -2 or 10