Answer: x=-1 is the answer 
Step-by-step explanation:
 
        
                    
             
        
        
        
You have 10 slices of cake, you and your friends Jerry, George, Martha, and Jenny ( just an example ) eat 2 slices of cake. 
A more real life one would be:
You have 6 bills to pay off, then two more come in, you only pay off 4, 
( I hope this helped, I'm sorry if any of this is wrong:) )
        
             
        
        
        
<em>Here is your answer </em>
<em> x = 17.5</em>
 <em>Make as brainliest plzz....</em>
<em>Hope this answer is helpful.</em>...
 
        
             
        
        
        
1.8n-1.5n=-6.2-4
3.3n=-10.2
n=-3.09
        
             
        
        
        
Answer:
   455 or 680, depending
Step-by-step explanation:
If we assume the three choices are different, then there are ...
   15C3 = 15·14·13/(3·2·1) = 35·13 = 455
ways to make the pizza. 
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If two or three of the topping choices can be the same, then there are an additional ...
   2(15C2) +15C1 = 2·105 +15 = 225
ways to make the pizza, for a total of ...
   455 + 225 = 680
different types of pizza.
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There is a factor of 2 attached to the number of choices of 2 toppings, because you can have double anchovies and tomato, or double tomato and anchovies, for example, when your choice of two toppings is anchovies and tomato.
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nCk = n!/(k!(n-k)!)