Answer:

Step-by-step explanation:
19*19=361.
<span>686.924 to the nearest ten is 690.0 because the ones place is a number of 5 and above, which means you must move the tens place up 1 value.</span>
There are no real solutions
9 OK there you go
if you don't think this is correct then ask someone else
Answer:
yes
Step-by-step explanation: