Simplify them until they can be simplified no more, then compare both sides. 
        
             
        
        
        
consider first number is = x
formula, 
(n / 2)(first number + last number) = sum, 
7/2(x+x+6)= 945
2x+6= 945×2/7
2x+6 = 270
2x= 270-6
x=264/2= 132
Answer the smallest number is 132.
 
        
             
        
        
        
Answer:

Step-by-step explanation:
Let p represent cost of each drink. 
We have been given that the medium pizza costs two times as much as one drink, so the cost of medium pizza would be  .
.
We are also told that the large pizza costs three times as much as one drink,  so the cost of la pizza would be  .
.
We have been given that Mary wants to buy one large pizza, one medium pizza, and three drinks.
Since the cost of one drink is p, so cost of 3 three drinks would be  .
.
The total cost of one large pizza, one medium pizza, and three drinks would be 
Mary started with $30, so amount left after all of her purchases would be 30 minus total cost of all purchases.

Therefore, Mary will have  dollars left after making all of her purchases.
 dollars left after making all of her purchases.
 
        
             
        
        
        
109-91 is 18, but multiplied is 9919
        
                    
             
        
        
        
It will cost $33. 
Since wood cost $ .60 sq ft, you can assume she needs to buy 55 sq ft because she will need to buy enough to have 54.3 square ft.
55 x $ .60 = $33
$32.58 would be he total for the 54.3 sq ft and .42 cents would be for the left over .7 sq ft that she didn’t use