In triangle ABC, angle BAC = 72 degrees. The incircle of triangle ABC touches sides BC, AC, and AB at D, E, and F, respectively.
Find angle EDF, in degrees.
2 answers:
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The point (-2, 5) is not included in the solution area
<h3>The graph of the inequalities</h3>The system of inequalities is given as:
y > 5x + 5
y > -2x+1
See attachment for the graph.
Since the inequalities use the greater than symbol, then the lines of the inequalities would be a dotted line and the upper part would be shaded
<h3>The solution area</h3>The point is given as:
(-2, 5)
The point (-2, 5) is not in the shaded area of the system of inequalities
Hence, the point is not included in the solution area
Mathematically, we have:
5 > 5 * -2 + 5 ⇒ 5 > -5 --- true
5 > -2 * -2 +1 ⇒ 5 > 5 --- false
Since both inequalities are not true, then the point is justified
Read more about system of inequalities at:
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