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The lines in which pair are parallel?

What is the volume of this square pyramid?

Television sizes are based on the length of the diagonal of the television's rectangular screen. so, for example, a 70-inch television is a television having a diagonal screen length of 70 inches. if a 70 inch television's diagonal forms a 29°angle with the base of the screen, what is the vertical height (1) of the screen to the nearest inch? 70 inhin

Write two point-slope equations for the line passing through the points (6, 5) and (3, 1)