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Which graph represents the solution of the inequality?

Which function in vertex form is equivalent to f(x) = x2 + 6x + 3? f(x) = (x + 3)2 + 3 f(x) = (x + 3)2 − 6 f(x) = (x + 6)2 + 3 f(x) = (x + 6)2 − 6

The price of a car has been reduced from $19,000 to $11,590. what is the percentage decrease of the price of the car?