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<image>Malaika is skiing on a mountain. The graph below shows her elevation, in meters, above the base of the mountain as she skis along a trail. In total, how many seconds does she spend at an elevation between $4$ and $7$ meters? <image1>
8
<image>If the point $(3,4)$ is reflected in the $x$-axis, what are the coordinates of its image? <image1>
(3,-4)
<image>The lines $y = -2x + 8$ and $y = \frac{1}{2} x - 2$ meet at $(4,0),$ as shown. What is the area of the triangle formed by these two lines and the line $x = -2?$ <image1>
45
<image>In triangle $ABC$, $\angle BAC = 72^\circ$. The incircle of triangle $ABC$ touches sides $BC$, $AC$, and $AB$ at $D$, $E$, and $F$, respectively. Find $\angle EDF$, in degrees. <image1>
54