I believe x is equal to 23
Answer:

Step-by-step explanation:
<u>Distance between two points</u>




Substituting points into the distance formula and solving for d:




The answer is 43 because it is half of 86 which is the radius
C is the answer because there is no variable for X which without it would make a horizontal line.
Answer:
a - b = 12
Step-by-step explanation:
Given
= 12 ← factor the numerator
a² - b² ← is a difference of squares and factors as
a² - b² = (a - b)(a + b)
Thus
= 12
Cancel the common factor (a + b) on numerator/ denominator, thus
a - b = 12