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22 ώρες πριν · Find step-by-step Linear algebra solutions and your answer to the following textbook question: Find x such that the matrix A is nonsingular. $$ A=\left [\begin {array} {rr} {3} & {1} \\ {x} & {-1} \end {array}\right] $$.
22 ώρες πριν · Algebra 2- cumulative exam. The Air Quality Index, or AQI, measures how polluted the air is in your city and assigns a number based on the quality of the air. Over 100 is "Unhealthy".
