90-20 leaves 70 for surfing. since surfing is 5 per hour, 70/5=14 hours she can surf.
Answer
-6y+4
4Step-by-step explanation:
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-2x-4y+{\color{#c92786}{10}}+2x-2y{\color{#c92786}{-6}}
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I believe the correct answer from the choices listed above is option A. If DF+FE=DE, then point F is <span>A. a midpoint of DE (with line over). F is the endpoint of line segment DF and is the starting point of line DE thus it is in between line DE. Hope this answers the question.</span>