If you divide decimals you have to bring up the decimal point but if you divide whole numbers you dont have any decimal points so you just divide the numbers. Sorry if i didnt help i just wanted to help.
Answer:
Given - Twice a no. decrease by 22 is 48
To find - The no.
Solution -
Let the no. be X
According to the question, equation made is -
2x - 22 = 48
2x = 48 + 22
2x = 70
x = 70/2
X= 35
Verification -
35 ×2 - 22 = 48
70 - 22 = 48
48= 48
LHS = RHS
hence proved
Answer:
Supply will decrease at the rate of 29 CDs per week.
Step-by-step explanation:
The number of retro portable CD players prepared to supply to a retail outlet every week is represented by the formula
q = 0.1p² + 9p
Here p = price offered
price it offers decreases at a rate of $1 per week.
In other words, 
Now we differentiate the given equation

![\frac{dq}{dt}=[0.1(2p)+9]\frac{dp}{dt}](https://tex.z-dn.net/?f=%5Cfrac%7Bdq%7D%7Bdt%7D%3D%5B0.1%282p%29%2B9%5D%5Cfrac%7Bdp%7D%7Bdt%7D)
Since, 
![\frac{dq}{dt}=(-1)[0.1(2p)+9]](https://tex.z-dn.net/?f=%5Cfrac%7Bdq%7D%7Bdt%7D%3D%28-1%29%5B0.1%282p%29%2B9%5D)
For p = 100,
![\frac{dq}{dt}=(-1)[(0.1\times 200)+9]](https://tex.z-dn.net/?f=%5Cfrac%7Bdq%7D%7Bdt%7D%3D%28-1%29%5B%280.1%5Ctimes%20200%29%2B9%5D)
= (-1)[20+9]
= -29
Therefore, 
Supply will decrease at the rate the rate of 29 CDs per week.
1. -3*-4+3= 15
Y=15
2.-3*-2+3=9
Y=9
3. -3*0+3=3
Y=3
4. -3*2+3= -3
Y= -3