D=dimes
q=quarters
if she has 12 coins then
12-d=q she has 12-d quarters
we dont know how much money she has unless we know d. 
she could have 12 dimes and 0 quarters or 11 dimes and 1 quarter etc. we need more information to solve.
        
             
        
        
        
Answer:
Step-by-step explanation:
The Pascal triangle is used to determine the coefficients of the terms when we expand the expression. 
                                              1                                 = 1
 = 1
                                          1       1                            
                                    1          2        1          
By extending the triangle, you will get the 9th row, which is your expression, of the coefficients. that is 
1          9       36    84    126    126    84    36    9    1
Now, fill in AB in the gaps.
1AB + 9 AB + 36AB + 84AB + 126AB + 126AB +84AB + 36AB + 9AB + 1AB
Next, you need to go from the left to fill out the exponent of A and it will go down from 9 (the exponent of the whole thing) . That is 

Next will be the exponent of B. this time, you go from the right and do the same with A. You can go from the left also, but go up from 0 to 9 for the exponent of B

The last step is just to simplify the A^0=1 and B^0 =1 at the first and the last terms.

Hope you can learn the method
 
        
             
        
        
        
The answer would be 14/15
Find a common denominator that both of the fractions can use. An easy way to do this is simply multiply the denominators together. So for 3/5 you would multiply by 3 to get the fraction 9/15 and then multiply 1/3 by 5 to get 5/15. Add both 9/15 and 5/15 to then get 14/15.
        
                    
             
        
        
        
<span>B) Observe several cases of people ordering food of varying spice-levels and number of soft drinks ordered. thats what i think though.</span>
        
                    
             
        
        
        
Answer:
step 2:do subtraction in the parentheses  
Step 3: distribute
Step 4: add
Step-by-step explanation: