Roy is 11 years old and his uncle is 59 years old.how many years ago was roy ,s uncle 7 times as old as roy.
1 answer:
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Answer:
the lines are perpendicular
Step-by-step explanation:
You can tell something by looking at the differences of coordinates:
B-A = (6-2, -11-5) = (4, -16) . . . . . Δy/Δx = -16/4 = -4
D-C = (-1-3, 9-10) = (-4, -1) . . . . . Δy/Δx = -1/-4 = 1/4
The product of the slopes of these lines is (-4)(1/4) = -1, so ...
the lines are perpendicular
Answer: 27
Step-by-step explanation: Look below for an attached explanation.
Hope this helps!
