- Statistics/probability help!?

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Autonomous drones. With gum stick ssds giving fast storage, and next gen apu's provide dynamic evironments, why is line of sight a barrier? Need to find the solutions to |2(x-1)| + y = 1 and x + 2|y-1| = 8 ? Why when copper (II) oxide is mixed with sulfuric acid it changes color from black to blue when heated? What is the frequency (in reciprocal seconds) of electromagnetic radiation with a wavelength of 1.45 cm? Enter in scientific notation? -6(-8b+7)=-90?