The vertices of δrst are r(–7, 0), s(–3, 6), and t(9, 2). m is the midpoint of rt, and n is the midpoint of st. show that mn∥rs and mn=12rs.

i have to find the locations of m and n, the slopes of mn and rs, and the lengths of mn and rs.

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Haruka hiked several kilometers in the morning. she hiked only 66 kilometers in the afternoon, which was 25% less than she had hiked in the morning. how many kilometers did haruka hike in all?

A3-dimensional figure has a square base and 4 lateral faces that meet at a point. explain the difference between the cross sections when a slice is made perpendicular to the base through the vertex, and when a slice is made perpendicular to the base and not through the vertex