(3c+s)(100-20)/100=100  multiply both sides by 100
(3c+s)80=10000  divide both sides by 80
3c+s=125  subtract 3c from both sides...
s=125-3c....now let's look at the second situation...
(4c+2s)(100-40)/100=120  multiply both sides by 100
60(4c+2s)=12000  divide both sides by 60
4c+2s=200  divide both sides 2
2c+s=100 subtract 2c from both sides
s=100-2c, and from earlier we saw that s=125-3c, since s=s:
100-2c=125-3c  add 3c to both sides
100+c=125  subtract 100 from both sides
c=25, and since s=100-2c
s=50
So cds cost $25.00 and sweatshirts cost $50.00
        
                    
             
        
        
        
Solution
Given the question in the image, the following are the solution steps to answer the question.
STEP 1: Write the formula for slope

STEP 2: Pick two points
STEP 3: Find the unit price per cup
Since 4 cups cost $5, one cup will cost

Therefore, the answer is $1.25
 
        
             
        
        
        
Answer:
the original price is 75.50
Step-by-step explanation:
 
        
             
        
        
        
Answer:
C. 
Step-by-step explanation:
The radius of the circle is 24 units, then the area of the whole circle is 

The shaded circle is limited by 45° angle, so its area is
 
 
of the area of the whole circle.
The area of the shaded circle is
 
 
 
        
             
        
        
        
Answer:
x = 2, y = -1.
Step-by-step explanation:
2x + y = 3
x  -   y  = 3
Adding the 2 equations eliminates y:
3x = 6
x = 2.
Substitute for x in the first equation:
2(2) + y = 3
y = 3 - 4
y = -1.
Check the results by substitution in equation 2:
2 - (-1)
= 2 + 1 = 3 . 
 Checks OK.