<span>4x(5y-x)-5y(4x-y)=20xy-4x^2-20yx+5y^2=-4x^2+5y^2=5y^2-4x^2</span>
        
                    
             
        
        
        
Answer:
46 cm
Step-by-step explanation:
2(5*1) = 10
2(1*3) = 6
2(3*5) = 30
add all those together and you get 46
 
        
             
        
        
        
Answer:
15/104
Step-by-step explanation:
To divide fractions take the reciprocal (invert the fraction) of the divisor and multiply the dividend. This is the quickest technique for dividing fractions. The top and bottom are being multiplied by the same number and, since that number is the reciprocal of the bottom part, the bottom becomes one.
 
        
             
        
        
        
Answer:
g(f(x)) = 3.15x
Step-by-step explanation:
To find the number of Japanese yen equivalent to x russian rubles, we need to put one function into another.
If we take f(x) and put in into g(x), we will get Japanese yen in terms of rubles. Thus,
g(f(x)) = 90 (0.035x)
g(f(x)) = 3.15x
THis is the composite function which represents the number of Japanese yen equivalent to x Russian Rubles.
 
        
             
        
        
        
Compare the two sets of numbers with a ratio. 1 can for 24 servings is to 1/2 can for x servings. 
x= # servings from 1/2 can
1/24= (1/2)/x
cross multiply 
1 * x= 24 * 1/2
x= 24/2
x= 12 servings 
ANSWER: She can make 12 servings from 1/2 can of juice. 
Hope this helps! :)