Answer:
Hello,
I have reply too quick in comments (sorry)
Step-by-step explanation:

 
        
             
        
        
        
It would be biased because one would assume that students can get to school by means other than those that put them 8n the parking lor. (Parking lot = car drivers who would be the only students sampled.). Others may ride to school by either parent or school bus who could drop them off somewhere else or possibly walk to school. The freshmen/sophomores would be excluded generally as they would be too young to drive altogether
        
             
        
        
        
C I need to put 20 letters so yea the answer is C
        
             
        
        
        
Answer:
Its 1.75
Step-by-step explanation:
hes going 0.25 faster every meet
 
        
             
        
        
        
Answer:
Step-by-step 
i) a² - 2ab + b² = (a + b)²
a² = p² ;     a  = p
b² = 16 = 4²  ;        b = 4
2ab = 2*p*4 = 8p
p² - 8p + 16 = (p - 4)²
ii) a² + 2ab + b² = (a +b)²
a² = 121x² = (11x)²                 ;  b² = 4y² = (2y)²
2ab = 2 * 11x * 2y = 44xy
121x² + 44xy + 4y² = (11x + 2y)²