Answer:
 A triangular bike path with lengths of 5 miles, 12 miles, and 13 miles
Step-by-step explanation:
The 5-12-13 right triangle is a common pythagorean triple. :)
 
        
                    
             
        
        
        
Answer:
x = -3
Step-by-step explanation:

 
        
                    
             
        
        
        
Answer: the best answer is 3(-3a-1)
Step-by-step explanation:
 
        
             
        
        
        
Let 
C=Cynthia's age today
A=Abigail's age today
then
at all times
A=C+8......................(1)
twenty years ago,
A-20=3(C-20)
simplifying
A=3C-40...................(2)
Equate (1) and (2),
C+8=3C-40
8+40=3C-C
C=24
=> 
A=32
Check:  A-C=8... ok   A-20=12  C-20=4  => (A-20)=3(C-20) ...ok
Answer:
Abigail is 32, Cynthia is 24.
        
                    
             
        
        
        
Answer:
T= (9)($.25) + $6.75
Step-by-step explanation:
total cost = 9($.25) + $6.75