Answer:
Definition: The enclosing boundary of a curved geometric figure, especially a circle.
Step-by-step explanation:
 
        
             
        
        
        
Answer:
x > 3
Step-by-step explanation:
This is based on the concept 'when a negative number is multiplied to both sides of the inequality, the sign gets reversed. For example, x > - 2 when it is multiplied by - 1, it becomes - x < 2.'
*only when the number is -ve. 
Similarly, in this question, multiply both sides by - 1. 
2x > 6 
x > 6/2
x > 3
For more : take - 5 > - 2, as you know
Note that 5 is actually greater than 2. To make this true we change signs 
 
        
             
        
        
        
15/50 = 0.3 
that’s 30% 
so 30% of people will not be wearing hats. 
30% of 250 = 250 x 0.3 
= 75 people
        
             
        
        
        
Answer:

Therefore, option C is true.
Step-by-step explanation:
From the graph, we get the sequence
7, 5, 3, 1, ...
Here,
a₁ = 7 is the first element.
An arithmetic sequence has a constant difference 'd' and is defined by  

computing the differences of all the adjacent terms

The difference between all the adjacent terms is the same and equal to

substituting a₁ = 7 and d = -2 in the nth term of the sequence


Therefore, option C is true.