Multiplying 20×1/2 is the same as dividing 20 by 2. Which means the answer is 10.
no
the table does not represent a proportional relationship.
First number --- (2a-1)
middle number ---- (2a)
third number -----(2a+1)
2a-1+2a+2a+1=250
6a=250
a=250/6= 125/3
2a=2*(125/3)= 250/3 ---- is not a whole number that is contradicts to what is given, so sum cannot be 250
so
