The number of miles in day at which the rental cost for the company A and Company B are the same is 200 miles
The Company A rented the truck for $40 a day plus $0.40 per miles
The expression will be
40+0.40x
Where x  is the number of miles
The company B rented the truck for $20 a day plus $0.50 per miles
20+0.50x
To find the number of miles in a day at which the rental costs for Company A and Company B are the same, the linear equation will be
40+0.40x = 20+0.50x
40-20 = 0.50x-0.40x
0.1x = 20
x = 200 miles
Hence, the number of miles in day at which the rental cost for the company A and Company B are the same is 200 miles
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Answer: No, you cannot. 
Step-by-step explanation: A square number cannot be a perfect number. 
The numbers: 0, 1, 5, 14, 30, 55, 91, 140, 204, 285, 385, 506, 650, 819, 1015, 1240, 1496, 1785, 2109, 2470, 2870, 3311, 3795, 4324, 4900, 5525, 6201 are examples of perfect numbers.
 
        
             
        
        
        
Answer:
$172.80
Step-by-step explanation:
$160.00 x 1.08=$172.80
 
        
             
        
        
        
Step-by-step explanation:
1) 
In a right triangle longest side is hypotenuse and the remaining two sides represent the perpendicular legs. 
Hence, from the given question it is obvious that 25 is hypotenuse and 20 and 15 are perpendicular legs. 
Now, by Pythagorean theorem: 
 
 
2)
Because all right triangles have one hypotenuse and two perpendicular legs.