Answer:
7x^5-x^2+14
Step-by-step explanation:
Hope this is what you are looking for! 
 
        
             
        
        
        
Answer:
Unicorn A is 300 years old
Unicorn B is 20 years old
Explanation:
15x + x = 320
16x = 320
x = 20
15 * 20 + 20 = 320
 
        
                    
             
        
        
        
Answer:
Taking into account the values showed for this food (image attached). It is required
5  
Servings.  
Step-by-step explanation:
The total calcium (Cat) required is 1300 mg/day.  
One serving of this food can have 260 mg.  
First step is to suppose one day of calculation. t = 1 day.
Cat = (1300 mg/day)(1 day) = 1300 mg Calcium.
One single serving can have 260 mg Calcium (Cas). So, we need to calculate the amount of servings (N) required to complete 1300 mg.
Cat = Cas*N
N = Cat/Cas = 1300 mg/260mg
N = 5.
Finally amount of servings is five N = 5.  
 
        
             
        
        
        
Answer:
x= -59
Step-by-step explanation:
x-31=-90
Adding 31 to both sides we get
x-31+31=-90+31
x=-59