0+12, 11+1, 4x3, 6x2, etc.
        
                    
             
        
        
        
Answer:
3 nickels and 5 quarters
Step-by-step explanation:
Let n = number of nickels
q = number of quarters
q = n+2
.25q + .05n = 1.40
Using the first equation and replacing q in the second equation
.25( n+2) + .05n = 1.40
Distribute
.25n+.50 +.05n = 1.40
Combine like terms
.30n +.5 = 1.40
Subtract .5 from each side
.3n +.5-.5 = 1.40-.4
.3n = .9
Divide by .3
.3n/.3 = .9/.3
n = 3
q = n+2
q=5
 
        
                    
             
        
        
        
Answer:
1. y = 11 
 x = -48
2. a =8 
 b= -10 
3. x= 1
 y= 2
Step-by-step explanation:
1 . 6x + 5y = 7
 x-y= 3
 6x+5y = 7
 6x-6y =18
 -1y = - 11
 6x + 5y = 7
 y = 11
 6x + 55 = 7
 6x = -48
 x = -48 
 
 
        
             
        
        
        
Answer:
1 1/4
Step-by-step explanation:
4/4 + 1/4 = 5/4
4/4 = 1
so 1 1/4
 
        
                    
             
        
        
        
3x^4 becomes 3(3x)^4=3*3^4*x^4
y^2 becomes (3y)^2=3^2y²
the new z=3² the old z, so b is correct.