- Name all the classes of nonsilicate minerals?

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If x^2+6x=9, what is the value of (x+3)^2? The answer is 18. I completed the square but i'm not sure what to do next? Find an equation of the line that satisfies the given conditions. Through (6, 3); perpendicular to the line y = 2? The line passing through point (4, -1) and perpendicular to the line whose equation is 2x - y - 7 = 0? A small pebble is thrown upward from a cliff with an initial speed 20ms-¹ . Calculate max height reached.? X^2+11x+10?