Answer:
See below
Step-by-step explanation:
We want to prove that 

Taking the RHS, note
 
Remember that

Therefore, 

Once

Then,

Hence, it is proved
 
        
             
        
        
        
Answer:
1/4
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
1. 15 (A)
2. 12 (G)
Step-by-step explanation:
1.  We can make an equation out of this...
     3x+3=48
     x is the age of Geoff which is what we are trying to find out
     
     We have to add 3 to both sides of the equation
     3x+3=48
          -3   -3
      ________
     we end up with 3x=45
      we then have to divide 3 by both sides because its the opposite of                
      multipling
     3x=45
     _____
          3
     we get x=15
2.   We can write a problem statement  
       (2 x 9)-6=?
        multiply 2 and 9 <u>FIRST</u>
       
        18-6=?
        your answer is 12
       Your Welcome! Have a great rest of your day! :)