Set up a proportion:
![\frac{1}{80} = \frac{x}{320}](https://tex.z-dn.net/?f=%20%5Cfrac%7B1%7D%7B80%7D%20%20%3D%20%20%5Cfrac%7Bx%7D%7B320%7D%20)
Cross multiply:
![80x = 320](https://tex.z-dn.net/?f=80x%20%3D%20320)
Divide both sides by 80 to isolate x:
![x = 4](https://tex.z-dn.net/?f=x%20%3D%204)
It takes four hours to travel to a location 320km away. Furthermore, it would take 8 hours to go to that location and return.
Hello! quartiles divide data into fourths, and percentiles divide data into hundredths! hope this helps! ;)
Answer:
A(x) = x(200-x)
Step-by-step explanation:
400 feet of fencing to enclose a rectangular dog exercise pen means the perimeter of rectangle is 400 feet
If x is length and y is breadth. Perimeter is given by :
P = 2(x+y)
400 = 2(x+y)
⇒ (x+y) = 200 .....(1)
y = 200-x
Area of a rectangle is given by :
A = xy
A(x) = x(200-x)
Hence, the area as a function of length of rectangle is x(200-x).
Let's call the original price x.
1.05x = 42
So x = 42/1.05
The original price was $40