Asked by Johnny
The distance between points A and B is 10 units. If a has coordinates (4,-6) and B has coordinates (-2,y), determine the value of y.
Please show work and explain.
A.-6
B.-2
C.0
D.1
E.2
This is what I got so far:
10= square root of (4-(-2))^2+(-6-(y))^2
Please show work and explain.
A.-6
B.-2
C.0
D.1
E.2
This is what I got so far:
10= square root of (4-(-2))^2+(-6-(y))^2
Answers
Answered by
Damon
(y+6)^2 + (-6)^2 = 100
y^2 + 12 y + 36 + 36 = 100
y^2 + 12 y - 28 = 0
(y-2)(y+14) = 0
y = 2 or -14
y = 2 is on your list
y^2 + 12 y + 36 + 36 = 100
y^2 + 12 y - 28 = 0
(y-2)(y+14) = 0
y = 2 or -14
y = 2 is on your list
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