Let the number be x, then:-
3x + 12 - 5x = 22
-2x = 10
x = -5 
 
        
             
        
        
        
The formula for compound interest is:

Given data:

a. After ten years, that is t = 10 years, the amount in the account will be

b. After twenty years, that is t = 20 years, the amount in the account will be:

c. The time it takes for Harry's initial account value to double will be:

Therefore, the time it takes Harry's initial account to double is approximately 11 years
 
        
             
        
        
        
Answer:
2.17 x 10^8
0.253 x 10^-4 if number is 0.000253 or 2.53 x 10^2 if number is 253
Step-by-step explanation:
 
        
             
        
        
        
Answer: y = 800
Step-by-step explanation:
3(y+200) = 3000
y+200 = 1000 (dividing 3 from both sides)
y = 800
 
        
             
        
        
        
The points where the 2 graphs intersect is  where x = 0 and x = 2.
-                 2                                  2
x   =    INT               x dA     /    INT        dA
                  0                                  0
INT dA   = INT -x^2 + 4x + 3 - (x^2 + 3 ) dx  =      INT -2x^2  + 4x
               =   -2 x^3/3 + 2x^2
               =   2.667  between 0 and 2
xdA  =   -2x^3 + 4x^2  INT xdA  =   -x^4/2 + 4x^3/3 = 2.667
centroid = 2.667 / 2.667  = 1  (x = 1)