If you meant:
64.3-3*(2³)/2
That would be 52.3 :)
        
                    
             
        
        
        
Answer:
Ali's salary is $50000.
Step-by-step explanation:
Let Jafar's salary be x.
(31/100)*x = 12400
x = (12400*100)/31
x = 400*100
x = $40000
Let Ali's salary be y.
y-[(20/100)*y] = 40000
y-(y/5) = 40000
(5y-y)/5 = 40000
4y = 200000
y = $50000
 
        
             
        
        
        
Step-by-step explanation:
perimeter is 4x+6 +20x-8=20x-2
area is 20x^2+22x-12
 
        
             
        
        
        
Answer:
FE = 28 and YZ = 28
Step-by-step explanation:
In similar triangles the ratios of corresponding sides are equal.
(4)
 =
 =  , substitute values
 , substitute values
 =
 =  ( cross- multiply )
 ( cross- multiply )
39(5x - 2) = 42(4x + 2) ← distribute parenthesis on both sides 
195x - 78 = 168x + 84 ( subtract 168x from both sides )
27x - 78 = 84 ( add 78 to both sides )
27x = 162 ( divide both sides by 27 )
x = 6
Thus 
FE = 5x - 2 = 5(6) - 2 = 30 - 2 = 28
(5)
 =
 =  , substitute values
 , substitute values
 =
 =  ( cross- multiply )
 ( cross- multiply )
35(3x - 7) = 40(2x + 2) ← distribute parenthesis on both sides
105x - 245 = 80x + 80 ( subtract 80x from both sides )
25x - 245 = 80 ( add 245 to both sides )
25x = 325 ( divide both sides by 25 )
x = 13
Thus
YZ = 2x + 2 = 2(13) + 2 = 26 + 2 = 28
 
        
             
        
        
        
Answer:
7.42 x 10^-4
0.000742
Step-by-step explanation:
0.
5389 | 4
0.0
5389 | 40
0.00
5389 | 400
0.000
5489 | 4000
0.0007
5489 | 40000
5489 | 2277
0.00074
5489 | 22770
5489 | 814
0.00074 so on