Answer:
Step-by-step explanation:
Ill try to break this down, simply:
When we talk about percentages we are talking about how much part of something we have and the percent sign is a just a symbol representing that.
Lets say we have 2 out of 10 apples and we need to convert this to a percentage 
First think about how many apples we have in total... and that would be 10, and then how many apples we currently have being 2:
So if we put the part that we have over the whole thing we get:

So now lets turn this into a decimal, when its something over 10 its really easy, all we have to do is move the decimal back one place!
So we have 2 and if we move the decimal back one place we get .2 or 0.2 
Now we have our decimal, to convert this into a percentage all we have to do is multiply our decimal by 100 
So:
0.2 x 100 = 20% 
All you do when you multiply by 100 is move the decimal back over 2 places one place for each zero so:
0.2 --> 2. --> 20.
Which gives us again 20%
 
        
             
        
        
        
Answer:
The answer is $33.6
Step-by-step explanation:
Each small package costs him $2.80
 3 small packages will cost him 3 x $2.80 = $8.4
  
Each large package costs him $3.60
7 large packages will cost 7 x $3.60 = $25.2
  
Cost to  send 3 small packages and 7 large packages = $8.4 + $25.2
= $33.6
 
        
             
        
        
        
Well you can solve two step equations by multiplying or adding or subtracting or dividing by the number and put a n on the answer because there is only one n in equatioN see the solve the modle
        
             
        
        
        
15t+4t+5t=6-30
24t=-24
t=-1
        
             
        
        
        
The 3rd one. It is the line that shows the average of most of the points since it’s more in the middle.