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How do you draw slanted restricted domain lines on a calculator? What is the molar mass of hydroxide ions, present in many bases? Calculating net income? Hello,I have an odd birthmark that resembles a constellation. Wanted to know if any one can look at it and let me know . Just curious.? How to calculate rank of a matrix {{2x, 2y, 2z}, {2x, 2y,2z-2}}?