Answer:
1/12
Step-by-step explanation:
 multiple of 3 and a multiple of 4 implies it can only be 12.
Since you only have the numbers from 1 to 12,
the prob(the 12) = 1/12
 
        
             
        
        
        
8 litres (amount of 20% solution needed) and 7 litres for (amount of 50% solution needed)
<u>Step-by-step explanation:</u>
Let consider ‘x’ for 20% acid solution and (15 – x) for 50% acid solution. And so, the equation would be as below,
                           20% in x + 50% in (15 – x) = 15 litres of 34%
Convert percentage values, we get
                               0.20(x) + 0.50 (15 – x) = 15 (0.34)
                               0.20 x + 7.5 – 0.50 x = 5.1
                               -0.3 x + 7.5 = 5.1
                               0.3 x = 7.5 – 5.1
                               0.3 x = 2.4

Apply ‘x = 8’ value in (15 – x) we get,
                          15 – 8 = 7 litres
The value of 7 litres for (amount of 50% solution needed)
 
        
             
        
        
        
Answer:
1d 6.742     1e 6
Step-by-step explanation: By sketching out the graph you can see the positive x intercept to find 1d
You can also replace h with 25 and isolate t to find 1e
 
        
             
        
        
        
Answer:
200,000
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
Next 3 of the sequence are 4, 7, 10
You are adding by 3. 
-2 - -5= 3
-2 + 3=1
1+3=4
4+3=7
7+3=10