Answer:
It helps you know if the answer is reasonable because when you do the work and get your answer, you can check if it is close to your estimate, and if it is, it is most likely correct. On the other hand if it is not close to the estimate it is most likely wrong, unless you estimated incorrectly.
Step-by-step explanation:
Answer:
Y = 43
Step-by-step explanation:
7^2 - y = 6
49 - y = 6
subtract 49
-y = -43
divide by -1
y = 43
Answer:
29
Step-by-step explanation:
c² = 2² + 5²
c² = 4 + 25
c² = 29
c = sqrt(29)
$123.75 you would round all of them to the nearest hundreth
Answer:
(±√3,±√+1)
Step-by-step explanation:
