Answer:
This equation system has no answer
Step-by-step explanation:

 
        
             
        
        
        
The answer for this is 37.5. I can't show the work because i searched it up on Google.
        
             
        
        
        
First, we need to work out the total number of students who were being surveyed. 
We know that half of the students has two pets. The rest of the students make up the other half. So, we have 3 students + 2 students + 8 students = 13 students that make half of the sample population
That means total number of students being surveyed is 13+13=26 students
Then we work out the probability
P(One pet) = 8/26 = 4/13
P(Two pets) = 1/2
P(Three pets) = 3/26
P( Four pets) = 2/26 = 1/13
The probability distribution is shown in the table below. Let 

 be the number of pets and 

 is the probability of owning the number of pets
 
        
        
        
Answer:
c=10mm
Step-by-step explanation:
Using pythagoras theorem,
hypotenuse²=base²+altitude²
=√19²+9²
=19+81
=100
Hypotenuse²=100
Hypotenuse=√100
=10