Firstly you have to reduce the 4 variables to a double system of equation with only 2 variables.
Let's say, first we have to eliminate Z:
Take 1st & 3rd equation & multiply each term of the 1st by (- 1). One done you add up the 1st & the 3rd & you will get:
5W - 4x + 2y = - 18
Follow the same methodology to find another equation without z. Once done you will have a system of 2 equation with 2 variable easy to solve,
At the end you will find:
w = -3
x = -2
y = -1
z = 3
C 87 the median :::::::::::::
Answer:
10
Step-by-step explanation:
The volume of a cube is equal to its (side length)^3
so s^3 = 1000
![s=\sqrt[3]{1000} =10](https://tex.z-dn.net/?f=s%3D%5Csqrt%5B3%5D%7B1000%7D%20%3D10)
