20 times 4 will get to 80
Answer:
The number of employees in 8 years is 442
Step-by-step explanation:
Given:
Decreasing rate = 7%
Current number of employees = 790
To Find:
The number of employees after 8 years is this same rate continues =?
Solution:
Let the number of employees after 8 years be x
The current number of employees is:
---------------------------------(1)
since the decrase rate is 7% we use 0.07
So after 8 years , eq (1) can be rewritten as
![790(1-0.07)^8= x](https://tex.z-dn.net/?f=790%281-0.07%29%5E8%3D%20x%20)
![790(0.93)^8= x](https://tex.z-dn.net/?f=790%280.93%29%5E8%3D%20x%20)
![790 \times 0.5595= x](https://tex.z-dn.net/?f=790%20%5Ctimes%200.5595%3D%20x%20)
x= 442.005
x= 442 (approx)
Answer:
x-2y=0 is a direct variation
Step-by-step explanation:
Direct variation is of the form
y= kx
Can we get the equation in that form
x-2y =0
Add 2y to each side
x-2y+2y =0_2y
x=2y
Divide each side by 2
x/2 = 2y/2
1/2x =y
Flip the sides
y = 1/2x
This is of the form y= kx where k = 1/2
x-2y=0 is a direct variation