Answer:
Original Price = 160
Sale Price =40
Step-by-step explanation:
Let Original Price be x and Sale Price be y
y=1/4 of x   (Equation 1)
x=120+y     (Equation 2)
Put value of x from equation 2 in equation 1
y= (1/4)*(120+y)
y=120/4 + y/4
y-y/4=30
3y/4=30
y=30*4/3
y=40
Put value of y in Equation 2
x=120+40
x=160
 
        
             
        
        
        
Answer:
the perimeter is 18
Step-by-step explanation:
 
        
             
        
        
        
Answer:
C. 430
Step-by-step explanation:
length: 11
weight: 5
height (double of weight): 10
2 * (5 * 11 + 10 * 11 + 10 * 5)= 430
 
        
             
        
        
        
Answer:
y=5/4 x
The slope is 5/4
Step-by-step explanation:
To solve this problem we need  to find the equation of the line, y=mx+b
We've been given a table with several points, so we can use two of them to perform our calculus.
To obtain the slope we need to use the equation of slopes:
 
Where (x1,y1) =(4,5) and (x2,y2)=(8,10)
m= (10-5)/(8-4)=5/4
To obtain b we can use the point (x2,y2)=(8,10) in the equation.
10=5/4 *8 +b
b=0
Hence our line has the following equation:
y=5/4 x