Square root 49 because the square root of 49 is 7.
Answer:
-4+2x-3
Step-by-step explanation:
The next term is 1.4 larger than the one before it, so the appropriate choice is

_____
However, the description

also correctly describes the relationship between a1 and a2, for example. While this equation is technically correct, it is less useful to work with, so is probably not the expected answer.
6 1/2 - 3 2/3 =
13/2 - 11/3 =
39/6 - 22/6 = 17/6 = 2 5/6 qts left
Yes. You did it right. Most of the angles are corresponding, and once you found the measure of x, you could use the corresponding angles postulate.