The given formula 
Solve for y means we have to make y alone
\\
Add -10 on both sides, we get

As there is multiplication sign between r and y so to solve for y, divide both side by r

Third length =
12-7 = 5
12+7 = 19
Third length can be only in this range
5Means the third length must be greater than 5 and less than 19.
Hope this helps!
GMC Answer : 3 because of there
Answer:
it will be 1/2
Step-by-step explanation:
because x×y={(6,2), (6, 8),(9,2), (9, 8)}