Number 19 I think is if you add the awnser to one of the numbers you where subtracting and you get the other number you where subtracting you are right like...
Lets say you had the problem 3-2 which is obviously 1 but if you did 2+1 it's 3 so that's how you check.
The middle one is proportional
Answer: The general term is an = 4n
Step-by-step explanation:
Step-by-step explanation:
What is 374 rounded to the nearest ten? 374 rounded to the nearest tens is 370.