How many times does the graph of y = x2 – 8x + 12 intersect the x-axis?

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If the value of cos330°is√3/2 then find cos 165°.

50 will mark show all use the linear combination method to solve the system of equations. explain each step of your solution. if steps are not explained, you will not receive credit for that step. 2x+9y= -26 -3x-7y=13