The way to determine the number of solutions is to complete the problem in multiple different ways.
        
             
        
        
        
Answer:
2
Step-by-step explanation:
 
        
             
        
        
        
Answer:
1/30
Step-by-step explanation: There are 30 students 19 play instr, 10 play spor,
8 who do both. Their is one student that was left out so the answer is 1/30
 
        
             
        
        
        
It is to be noted that for this item, we more concern of the pounds of flour. The number of batches is calculated by dividing the total mass of flour used by the amount per batch. That is,
                                              n = 86 lbs / (1 + 5/8 lbs/batch)
                                              n = 52.92 batch
Thus, the chef makes approximately 53 batches of pasta. 
        
             
        
        
        
Answer:
Number of pineapples= 10 
number of pears = 19 
number of kiwis = 10 -2 = 8
Step-by-step explanation:
Cost of a pear = $ 0.50 
Cost of a pineapple = $ 1.5 
cost of a kiwi = $ 0.3
Let the pineapples = p
Number of pears = 9 + p
Number of kiwis = p - 2 
The cost is 
0.15 p + 0.5 (9 + p) + 0.3 (p - 2) = 13.50 
0.15 p + 4.5 + 0.5p + 0.3 p - 0.6 = 13.50 
0.95 p = 9.6 
p = 10