When you estimate, you round each number, the add.
We round them to
700+620, which is 1320
So our non estimated answer is 1323
But our estimated answer is 1320
Answer:
Step-by-step explanation:
............................................ (1)
............................................ (2)
now equate both (1) and (2)



now substitute the values of x ,
when
, y becomes 0
when
, y becomes 8
so, solution set:
and 