That's the distance formula, which is the Pythagorean Theorem applied to the points.
The distance between (a,b) and (c,d) is 
a-c is the signed distance in the x direction between the points. b-d is the signed distance in the y direction between the points. Since the axes are perpendicular, these make a right triangle whose hypotenuse is the distance between the points.
Here that just means our distance is

Answer: B 4.1 units
Answer:
3.2
Step-by-step explanation:
range is the highest number - the lowest number
66.3-63.1
3.2
Answer: $ 360
Step-by-step explanation:
since the monthly payment is 3% of the price , this means that the monthly payment is 3% of 12000
= 0.03 x 12000
= $ 360
4(2y−9) is the correct answer
Answer:

Step-by-step explanation:
The distributive property: <em>a(b + c) = ab + ac</em>.
