Aparallelogram has one angle that measures 80° measures of the other three angles in a parallelogram?

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Solve each quadratic equation by factoring and using the zero product property. [tex]x^2+6x+8=0[/tex]

Write the component forms of vectors u and v, shown in the graph, and find v − 2u. u= (< -3, -2> , < -3, -1> , < -2, -2> , < -2, -1> ) v= (< -5, 1> , -4, 0> , < 0, -4> , < 1, -5> ) v-2u= (< 5, 3> , < 0, 4> , < 4, 0> , < 5, -3>