Combine like terms. 7a^2 - a^2 + 16 z^2 + z + 4z^3 + 4z^2 1/4(16 + 4p)

1. -a^2+7x^2+16
2. 4z^3+5z^2+z
3. p+4

Use a calculator basically

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.