Answer:

Step-by-step explanation:
Given;
x² - 2x - 1 = 0
Solve by completing the square method;
⇒ take the constant to the right hand side of the equation.
x² - 2x = 1
⇒ take half of coefficient of x = ¹/₂ x -2 = -1
⇒ square half of coefficient of x and add it to the both sides of the equation


⇒ take the square root of both sides;

Therefore, option B is the right solution.
Answer:
i'm pretty sure the one you have selected in the photo is right
Step-by-step explanation:
Change in y over the change in x
-1-7=-8
1- -3=4
-8 divided by 4
Slope=-2
A) the only mistake is changing the mixed number to an improper fraction .
1 in 10 is the probability of two people picking the same number.