8
round each number to the nearest 10, then
640 ÷ 80 = 8 ← estimate
Let the required number be x, then
x + 3,080 = 5,082
x = 5,082 - 3,080
x = 2,002
Answer:
(2,-4)
Step-by-step explanation:
-4+2=-2
10+-4=10-4=6
Answer:
irrational
Step-by-step explanation:
3/4 + sqrt(2)
3/4 is rational
sqrt(2) is irrational
The sum of a rational and an irrational number is irrational