Let us call the rate as velocity. Now the velocities of the plane and of the wind are:
![v_{p}](https://tex.z-dn.net/?f=%20v_%7Bp%7D)
and
![v_{w}](https://tex.z-dn.net/?f=%20v_%7Bw%7D%20)
:
Now
case 1:
![v_{p} - v_{w} =4620/6=770 km/h](https://tex.z-dn.net/?f=%20v_%7Bp%7D%20-%20%20v_%7Bw%7D%20%3D4620%2F6%3D770%20km%2Fh)
case 2:
![v_{p} + v_{w} =3750/3=1250 km/h](https://tex.z-dn.net/?f=%20v_%7Bp%7D%20%2B%20%20v_%7Bw%7D%20%3D3750%2F3%3D1250%20km%2Fh%20)
from equation 2:
![v_{w} = 1250 - v_{p}](https://tex.z-dn.net/?f=%20v_%7Bw%7D%20%3D%201250%20-%20%20v_%7Bp%7D%20)
substitute in equation 1:
![v_{p} - 1250 + v_{p} =770 v_{p} = 1010 km/h](https://tex.z-dn.net/?f=v_%7Bp%7D%20-%201250%20%2B%20v_%7Bp%7D%20%3D770%20v_%7Bp%7D%20%3D%201010%20km%2Fh%20)
Which is your velocity in still air (without wind)
Substituting back in:
![v_{w} = 1250 - v_{p}](https://tex.z-dn.net/?f=%20v_%7Bw%7D%20%3D%201250%20-%20%20v_%7Bp%7D%20)
you get:
![v_{w} = 1250-1010 = 240 km/h](https://tex.z-dn.net/?f=%20v_%7Bw%7D%20%3D%201250-1010%20%3D%20240%20km%2Fh%20)
which is the wind velocity
Answer:
c
Step-by-step explanation:
let x represent the equally priced bracelets of which there are 4 , so 4x
We know she spent $64 on rings and a total of $200 was spent , then
64 + 4x = 200 ← represents the situation
x represents the cost of a bracelet
Answer:
17x(1 - 2y)
Step-by-step explanation:
Given
17x - 34xy ← factor out 17x from each term
= 17x(1 - 2y) ← in factored form
Answer:
option 2
Step-by-step explanation:
:-)
The tenth term should be 17