Factor the numerator to get:
(-3z(z+5))/(z+5) now you notice that (x+5) cancel out leaving:
-3z
Answer: 
Step-by-step explanation:
Let x= Total land.
Then for Maize =
For Potatoes = 
For beans = 

1 ha = 10000.00 m²
0.9375 ha = 9375 m²
Land for potatoes = 
Hence,
of the land is on potatoes.
Answer: None of the above
Step-by-step explanation: Because none of them will equal the solution which is 0.5,
1.7 + (-1.2) = 0.5