Answer:
{x| 43 ≤ x ≤ 47} where x = Sean's speed (in mph)
Step-by-step explanation:
Sean is taking driver's ed. The instructor asked him to stay within 2 miles of the posted speed limits. The current speed limit is 45 mph. 
So, the maximum speed which Sean can reach is, (45 + 2) mph
                                                                                    =47 mph
and,  the minimum speed which Sean can reach is, (45 - 2) mph
                                                                                    =43 mph
so, {x| 43 ≤ x ≤ 47} where x = Sean's speed (in mph)
 
        
             
        
        
        
1/40+1/50=1/n
5/200+4/200=1/n
9/200=1/n
9n=200
n=200/9 minutes for both of them to prepare the field
☺☺☺☺
        
             
        
        
        
Answer:
 The line segments are equal in length
AC = BC = 5
Step-by-step explanation:
 
        
             
        
        
        
$1059.83 Use this formula: 

P=principal of 519
r= your rate of 4.2% as a decimal
n=number of compounding periods; yours is daily or 365 day in a year.
t=time involved of the investment in years; yours is 17
 
        
        
        
Answer:
94,080 cm^3
Step-by-step explanation:
V= L • W • H
V= 42 • 35 • 64
V= 94,080 
Hope this helps, good luck!