Answer: average speed of the train = 4,483.0 km/h
Step-by-step explanation:
 Speed = Distance / Time 
 Distance = 66 km
 Time = 15.47  cancelling 15, we have 60 sec added to 47 sec
          <u> - 14.54</u>
=         14.   107    60 + 47
          <u> - 14.  54</u>
<u>                     53secs</u>
53secs to hours becomes =
 60 secs = 1 min
60 min= i hour 
 therefore 53seconds =53/3600=0.0147222hours
Speed= 66/ 0.0147222= 4,483.025
 Rounding to 1 dp becomes= 4,483.0 km/h
 
        
             
        
        
        
Answer:
1
Step-by-step explanation:
We have the function

and we want to know the value of  .
.
The first step is to find  ; we can subtract 1 from it at the end! But what does
 ; we can subtract 1 from it at the end! But what does  mean?
 mean? 
Basically, we're saying <em>"what is the value of the function when </em> <em> ?"</em>
<em> ?"</em>
So, we simply replace  with 3 in the function, and we get:
 with 3 in the function, and we get:
 .
.
Finally, we subtract 1 to find  .
.
 
        
             
        
        
        
Answer:
x = 5
Step-by-step explanation:
Since we know that the diagonals bisect each other and divide into equal parts so ➡
x - 2 = 2x -7
2x - x = 7 - 2
x = 5
 
        
             
        
        
        
Answer:
outside the circle
Step-by-step explanation:
diameter and radius are the main attractions in maths regarding circles.