Answer:
25% of the total cars in the garage received oil change.
Step-by-step explanation:
Total cars in the garage = 56
Number of cars which required oil change = 14
Now, Percentage of Oil Change = 
=
or,Percentage of Oil Change = 25%
Hence, 25% of the total cars in the garage received oil change.
3x+81=-9
=>3x+81+9=0
=>3x+90=0
=>3x=-90
=>x=-90/3
=>x=-30
A= 1/2 b= -3 c= -2
that's it.
This will be the graph of your equation. hope it helps
Which sampling method divides the population up into sections, randomly selects some of those sections, then chooses all the members from the selected sections to study?
Answer: The above mentioned type of sampling is called cluster sampling.
Cluster sampling is a sampling technique in which the entire population of interest is divided into clusters or groups, then the investigator randomly selects some of these clusters and all the members of these randomly selected clusters are investigated.
