18 - (-f) = 91
Subtracting a negative value changes to addition:
18 + f = 91
Subtract 18 from both sides:
F = 73
First, subtract 40,218-37,842
ex. 40218
-37842
-------------
2,376
Then, round 2,376 to the nearest thousands
2,376 -> 2,000
2,000 is your answer
The slope of these coordinates is -2
The speed of a yacht traveling a distance of 1.357 km in 165 minutes is 0.5 km/h
<h3>What is Speed?</h3>
The speed of an object is the distance covered by the object in respect to time.
Mathematically:


- We know that 60 minutes = 1 hour
- 165 minutes = 2.75 hours

Speed = 0.5 km/hour
Learn more about calculating speed here:
brainly.com/question/4931057
Answer:

Step-by-step explanation:
According to the two tangent theory, tangent MN and tangent NP, which are both from point N, are congruent.
That is, 
Solve for x

Subtract 4 from both sides

