Make a system of equations.


Plug in 2d for 'q' in the first equation:


Multiply:

Combine like terms:

Divide 0.60 to both sides:

Now plug this into any of the two equations to find 'q':



So she has 10 dimes and 20 quarters.
 
        
                    
             
        
        
        
Answer:
a
Step-by-step explanation:
These are basic properties of parallelograms and there's really no way to explain other than memorizing them.
 
        
             
        
        
        
Is that 123 or 12 times 3
        
                    
             
        
        
        
Answer:
a. 64 x ($)8 = ($)512
b. 45 (members) / 9(weeks) = 5 (members per week)