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If x = 3, evaluate the expression 5x If x = -3, evaluate the expression 5x If x = 3, evaluate the expression -5x If x = 3, evaluate the expression -x + 7 If x =-3, evaluate the expression -x + 7 If x = 3, evaluate the expression -x + 7 If x = 3 and y = -2, evaluate the expression xy + 7 If r = 2 and t=-3, evaluate the expression -3r + 7t - 9 If r = 5 and t = 6, evaluate the expression -4r - t + 10 If r = -5 and t = 6, evaluate the expression r2 + 4t -5 If m = 6 and n = 8, which equations are correct? Select all that apply. -3m + 7n - 9 = -64 m2 + 4n - 5 = 63 2m + t2 + 13 = 17 -4m - n + 10 = -22 |