This is easy young one it is 6.5 because you move the decimal place 2 places to the left when dividing by 100
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(9x^2 +4x -7) - x^2 +2x - 6
8x^2 +6x - 13.
Get a grip on your life son. This is really simple.
I think it is 264 divided by 48 = 5.5 (5 and a half hours)
May want to check but I think this is correct