So remember that area of a rectangle is a = bh. In this case, our sides are 2 and n - 3 (three less than unknown number) and our area is 22. Using our info, we can form the equation: 
. From here we can solve for n.
Firstly, foil 2(n-3): 
Next, add 6 on both sides of the equation: 
Next, divide both sides of the equation and your answer will be 14 = n. In context, the value of the unknown number is 14 in.
(1/12) / (1/3) = 1/x....now just solve it like a proportion.....oh, and x represents the number of hrs it would take to fill the whole tank
Answer:
8
Step-by-step explanation:
use tangent so opp/adj
9/tan4 which equals 7.7 or 8
Not 100% sure but Eric can be 18.5 years old and his father can he 51.5 years old.
52 - 33 = 19; 52 + 19 = 71
51 - 33 = 18; 51 + 18 = 69
51.5 - 33 = 18.5; 51.5 + 18.5 = 70
I hope this helps.
