Math question: The position vector A = 3i + 4j represents a displacement of 3 units in the x-direction and 4 units in the y-direction. If a second vector B = -2i + 5j represents a displacement of -2 units in the x-direction and 5 units in the y-direction, what is the sum of these vectors?
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Question: What is the equation of an ellipse centered at (h, k) with semi-major axis a and semi-minor axis b?
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What is the equation for a straight line given the coordinates of two points (x₁, y₁) and (x₂, y₂)?