11x + 10y - 8x - 12y (a) x + -2y (b) 3x + 2y (c) -x + 2y (d) 3x + -2y
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The relation is that the diameter is twice the length of the radius.
To make more proof, look at the attached image below.
<h3>The distance between two landmarks is 123 meters</h3>
<em><u>Solution:</u></em>
We have to find the distance between two landmarks
<em><u>Use the law of cosines</u></em>
The third side of a triangle can be found when we know two sides and the angle between them
Here, angle between 90 meters and 130 meters is 65 degrees
From figure,
a = 90
b = 130
c = d
Therefore,
Thus, the distance between two landmarks is 123 meters