Which expression is equivalent? −9(−2x − 3) a) 18x + 27 b) 18x − 27 c) −18x + 27 d) −18x − 27

If you expand -9(-2x-3) you get 18x+27 (a minus times a minus is a positive) so the answer is A.

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.