Answer:x=2, y=1, z=-1
Step-by-step explanation:
Given
2x+y+z=4----1
x-y+3z=-2----2
-x+y+z=-2----3
Add 2 & 3 we get
4z=-4
z=-1
Put value of z in 1 & 2
2x+y-1=4
2x+y=5----3
x-y+3(-1)=-2
x-y=1------4
add 3 & 4 we get
x=2
Put x & z in 1
y=1
Answer:
x^3+2÷x^2
Step-by-step explanation:
Answer:
Express 0.92 as a percent
Step-by-step explanation:
Multiply both numerator and denominator by 100. 0.921 × 100100 = 92100.
Write in percentage notation: 92%
Given:
Sides of a rectangle are 9.5x+14.3y cm and 11.7x+22.8y cm.
To find:
The perimeter of the cardboard in terms of x and y.
Solution:
We know that, perimeter of a rectangle is

Now,
![Perimeter=2[(9.5x+14.3y) +(11.7x+22.8y)]](https://tex.z-dn.net/?f=Perimeter%3D2%5B%289.5x%2B14.3y%29%20%2B%2811.7x%2B22.8y%29%5D)
On combining like terms, we get
![Perimeter=2[(9.5x+11.7x) +(14.3y+22.8y)]](https://tex.z-dn.net/?f=Perimeter%3D2%5B%289.5x%2B11.7x%29%20%2B%2814.3y%2B22.8y%29%5D)
![Perimeter=2[21.2x +37.1y]](https://tex.z-dn.net/?f=Perimeter%3D2%5B21.2x%20%2B37.1y%5D)
using distributive property, we get


Therefore, the perimeter of the cardboard in terms of x and y is 42.4x+74.2y cm.