For this case, the first thing we must do is define variables:
p: plane speed
w: wind speed
With the wind in favor, the speed is:
![p + w = 1920/2 ](https://tex.z-dn.net/?f=p%20%2B%20w%20%3D%201920%2F2%0A)
With the wind against the speed is:
![p - w = 1920 / 3.2 ](https://tex.z-dn.net/?f=p%20-%20w%20%3D%201920%20%2F%203.2%0A)
Rewriting both equations, we have the following system of equations:
![p + w = 960 p - w = 600](https://tex.z-dn.net/?f=p%20%2B%20w%20%3D%20960%0A%0Ap%20-%20w%20%3D%20600)
Then, solving the system of equations (graphically for example), we have the solution is:
![p = 780 w = 180](https://tex.z-dn.net/?f=p%20%3D%20780%0A%0Aw%20%3D%20180)
Therefore, jet stream's speed:
Answer:
A) p + w = 960; p - w = 600; jet stream's speed = 180 km / h
980,507 i believe... maybe
Answer:
![25x^{3}-15x^{2} -38x-8](https://tex.z-dn.net/?f=25x%5E%7B3%7D-15x%5E%7B2%7D%20-38x-8)
Step-by-step explanation:
Multiply the equations together
(5x+4)(5x^2-7x-2)
25x^3-35x^2-10x+20x^2-28x-8
Add like terms
25x^3-15x^2-38x-8
Either the amount of galleons or the galleys.
if given the amount of galleons, you can find the amount of galleys by dividing the number of given galleons by 5.
if given the amount of galleys, you can find the amount of galleons by multiplying the number of given galleys by 5.
Answer:
x² - 4x + 3
Step-by-step explanation:
When multiplying binomials (two terms in an expression), use FOIL. It stands for the first, outside, inside, and last terms in each bracket.
(x−3)(x−1) Expand with FOIL
= x² - x - 3x + 3 Collect like terms
= x² - 4x + 3