Round off 764.93 to the nearest tenths

Ineed to know the ordered pairs for this equation i need the answer quick because it’s a timed test

What is the slope of any line parallel to the line 8x+9y=3 in the standard (x,y) coordinate plane?

How many revolutions will a car wheel of diameter 28 in. make over a period of half an hour if the car is traveling at 60 mi/hr? the final answer is supposedly 21,609 but i have no idea how to get that, show work : )