Question 1078444
Determine the acute angle at which y = 2x - 1 and y = 0.5x + 2 intersect. 
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The two lines and the x-axis form a triangle.
Find the appropriate angles at the axis.
angle:: arctan(1/2) = 26.57 degrees 
angle2:: 180-arctan(2) = 116.5 degrees
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Ans:: 180-[116.5+26.57] = 36.93 degrees
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Graph:
{{{graph(400,400,-5,4,-4,6,2x-1,0.5x+2)}}}
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Cheers,
Stan H.
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