Answer:
radius = 5
Step-by-step explanation:
The equation of a circle in standard form is
(x - h)² + (y - k)² = r²
where (h, k) are the coordinates of the centre and r is the radius
Here r² = 25 ( take the square root of both sides )
r =  = 5
 = 5
 
        
                    
             
        
        
        
Part A: 
 First we define the variable to be used for the problem:
 x: the number of pages that Sandra should fax
 The inequality for rent is:
 0.06x <= 80
 Note that the price will be less than using the fax from the office, since for the same number of pages, we have:
 y = 0.10x
 Answer:
 an inequality that can be used to calculate the number of pages that Sandra should fax in a year is:
 0.06x <= 80
 Part B:
 0.06x <= 80
 From here we clear x:
 x <= 80 / 0.06
 x <= 1333.33333
 Nearest whole number
 x <= 1333
 Sandra can use the leased fax for 1333 pages and the cost will be:
 1333 * 0.06 = 79.98 $
 Using the office fax the cost will be:
 1333 * 0.1 = 133.3 $
  Answer:
 By renting the sara machine, you save:
 133.3-79.98 = 53.32 $
        
             
        
        
        
Solution:
we are given that 
In a certain grocery store, strawberries cost $6.40 per pound ( 6.40 dollars/lb ). 
we have been asked to find the cost per ounce?
As we know that 
16 oz=1 lb
so we will divide by 16 to get the cost per ounce.
strawberries cost $6.40 per pound so for 1 oz it will cost  $
$
Hence cost per ounce is 0.40 $
 
        
             
        
        
        
Answer: 3 * n = 15
5 students tried out for the baseball team.
Step-by-step explanation:
n is the amount of kids who tried to try out for the baseball team.
15 kids tried out for the hockey team, and that’s 3 times as many as the amount who tried out for the baseball team, so 3 times n = 15, or 3 * 5 =15 
hope this helped!