Answer:
$14000
Step-by-step explanation:
Given parameters: 
Amount earned by employee x  = $5250 
Time duration  = 3weeks 
Unknown: 
Amount earned in 8 weeks = ? 
Solution: 
Let us first find the rate of employee x earning; 
        Rate  =  
  
 Insert parameters; 
       Rate  =  = $1750/week
  = $1750/week 
So, 
   In 8 weeks; 
       Amount earned  = rate x time duration 
       Amount earned  =  $1750/week x 8weeks
       Amount earned  = $14000
 
        
             
        
        
        
Answer:
(C) 30πcm
Step-by-step explanation:
In order to find circumference you use the formula C (circumference)=2(pi)(r) in which r is the radius. In this case, two and 15 are thirty so to find the circumference all you have is the equation 30 times pi centimeters is equal to the Circumference.
 
        
                    
             
        
        
        
Answer:
80
Step-by-step explanation:
 
        
                    
             
        
        
        
The slope of x-y=8 is 1 because it's actually y = x-8
Parallel means the slope is equal to 1 as well.
        
             
        
        
        
Answer:
a = -4.
Step-by-step explanation:
 If the are perpendicular then the slope of one graph will be - 1 / slope of the other. 
Convert each equation to slope-intercept form:
x + 2y + 3 = 0
2y = = -x - 3 
y = (-1/2)x - 3/2 (Slope/intercept form)
So the slope of the line perpendicular to this  will be - 1 / (-1/2) = 2.
Consider the other line:
ax + 2y + 3 = 0
2y = -ax - 3
y = (-a/2) x - 3/2  (Slope/intercept form) 
So the slope for this line    - a/2 and it equals  2.
 -a/2 = 2
-a = 2*2 = 4
a = -4 (answer).