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Solve the system by the substitution method. 

Solve the system by the elimination method.  x + 7y = -14-5x + 8y = -16

Factor completely.20×2 – 27xy + 9y2

Factor the polynomial completely.x2 + 2xy – 48y2

Factor the trinomial.3×2 – 3x – 18

Name the quadrant, if any, in which the point is located.(, )

Factor the polynomial.x3 + 2×2 + x + 2

Factor the trinomial, or state that the trinomial is prime.x2 + 2x – 35

Find the y- and x-intercepts for the equation. Then graph the equation.3x – 6 = y

Factor completely.8y2 – 18y + 9