The distance between the points (8, -16) and (26, k) is 30 units. What is the value of k?
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Distance = √{(X1-X2)²+(Y1-Y2)²}
30 = √{18²+(k+16)²}
30² - 18² = k²+16² + 32k
k²+ 22k - 320 = 0
(k+32)(k-10) = 0
Value of k is -32 or 10
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