Your answer will be c. -14x+9
Listing out a few elements of the set of perfect squares, we get the following values
{1, 4, 9, 16, 25, 36, 49, 64, 81, 100, ...}
we can stop there because 82 is between 81 and 100
So if x^2 = 82, then x^2 is between 81 and 100 meaning
81 < x^2 < 100
apply the square root to all sides of the compound inequality and we get
9 < x < 10
So the square root of 81 is between 9 and 10
Answer: the value falls between 9 and 10
X=2.. start off with the numbers you know then do trial and error with the options you have
1. 3, 5, 7
2. 4, 6, 8
3. 1&2, 3&4, 1&8
4. line c
5. 180-131=49
6. 180-57=123
7. 180-127=53 (angle 6) 6 and 2 are congruent by alternate interior angles, 2 and 8 are congruent by vertical angles. Angle 8 is 53
8. 90
1/2 w + 5 = 12
Subtract 5 from each side: 1/2 w = 7
Multiply each side by 2 : w = 14