Answer:
r =   4/(x+y)
Step-by-step explanation:
rx + ry = 4
Factor out r
r ( x+y) = 4
Divide each side by (x+y)
r ( x+y) /(x+y) = 4/(x+y)
r =   4/(x+y)
 
        
             
        
        
        
X = 25 
a^2 + b^2 = c^2
19^2 +16^ = c^2
617 = c^2
(Square root 617) 
x=24.83
x=25
        
             
        
        
        
When we multiply the polynomials we will get:
(5x^2+2x)(3x^2-7x+4)
=5x^2(3x^2-7x+4)+2x(3x^2-7x+4)
=15x^4-35x^3+20x^2+6x^3-14x^2+8x
=15x^4+(6x^3-35x^3)+(20x^2-14x^2)+8x
=15x^4-29x^3+6x^2+8x
The correct answer is C
        
             
        
        
        
75.25x + 3604 = 300.50x
300.50x - 75.25x = 3604
225.25x = 3604
x = 16
Both companies charged the same at 16 tons
first answer 16 tons
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300.50x = 300.50(16) = $4,808
both companies charged the same are $4,808
second answer is $4,808
        
             
        
        
        
Answer:
Step-by-step explanation: