M(6, 6) is the midpoint of mc139-1.jpg. the coordinates of s are (8, 9). what are the coordinates of r?

The midpoint is just the average of the endpoint coordinates.

(6,6)=((8+x)/2, (9+y)/2)

(12,12)=((8+x), (9+y))

(4,3)=(x,y)

So the coordinates of R are (4,3)

At a constant it will take one hour to travel 32 mi.at that speed it will take 1/2 hr to travel the remaining 16 mi.it will take 1+1/2 hr to travel the 48mi @ 32mph.so 1 hr = 60 min& 1/2 hr = 30 min1+1/2 hr = 90 min.there are 60s in each 90 × 60 = 3600 seconds.the real question seriously is he why are they driving so slow? ! lol.