What is the area of a triangle created by the intersections of the lines $x=4, y=5$ and $y=-\dfrac34x+20$

What is the area of a triangle created by the intersections of the lines $x=4, y=5$ and $y=-\dfrac34x+20$

A. 42
B. 54
C. 66
D. 72
E. 96

Answer: E

Source: Veritas Prep

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