A.) R(20) = -10(20)^2 + 800(20) = -10(400) + 16000 = -4000 + 16000 = $12,000
R(25) = -10(25)^2 + 800(25) = -10(625) + 20000 = -6250 + 20000 = $13,750
R(30) = -10(30)^2 + 800(30) = -10(900) + 24000 = -9000 + 24000 = $15,000
b.) For maximum revenue, dR/dp = 0
dR/dp = -20p + 800 = 0
20p = 800
p = 40
Therefore, the maximum revenue will be recorded when the price is set at $40.
        
             
        
        
        
Answer:
x= 72
Step-by-step explanation:
combine the Xs on one side and then make the denominators the same and solve
8/12X +6 = 3/4X
sub 6 on both sides
then sub 3/4 (aka. 9/12)
-1/12X= -6
multiply by reciprocal (the fraction flip-flopped)(-12) on both sides 
and you get 72
 
        
             
        
        
        
Answer:
-10, -3,  5, 16
Step-by-step explanation:
even though the negative number (10) might seem big, but its not
 
        
                    
             
        
        
        
Answer:
Fraction: x = 247/21
Decimal: 11.76
Mixed Number: 11 16/21
Step-by-step explanation:
Brainliest Please!!