Answer: x ≤3
Step-by-step explanation:
Your answer is correct
 
        
             
        
        
        
Answer:
B
Step-by-step explanation:
use quadratic formula:  (-b ±√b²-4ac) ÷ 2a
a = 10,  b = -9,  c = -6
 
        
             
        
        
        
Answer:
280 hours
Step-by-step explanation:
Amount paid + profit = cost of a lesson per hour 
 $2000   + $5000 = $25(h)
7000 = 25h
7000/25 = h
    280 = h