Question

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Answer 1

Answer:

on squaring both sides 14

y=6 y= -6

Answer 2

Step-by-step explanation:

By distance formula d(D,E) =

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

$10 = \sqrt{(1 - y) + {8}^{2} }$

On squaring both sides,

$100 = (1 - y) {}^{2} + 64$

$(1 - y) {}^{2} = 36$

1 - y = 6 or 1 - y = -6

Therefore , y = 5 or y = 7