Answer:
A board that is 4 1/2 feet long weighs 7 1/5 pounds. How much would one foot of the board weigh? Write your answer as a mixed number
Step-by-step explanation:
 
        
             
        
        
        
<span>Choices: 30 units ;
20 units ; 15 units ; 
7.5 units
Given:
perimeter = 30 units
scale factor = 0.5
30 units * 0.50 = 15 units
The perimeter of the resulting triangle is 15 units.</span>
        
             
        
        
        
Answer:
x=70
Step-by-step explanation:
x/10=7 
First you need to get the x by itself, so you should do the opposite of what is happening to the x. 
In this case the x is being divided so you would need to multiply. 
So multiply the x by 10 and this gets it by itself.
But you have to do to one side what you do to the other.
So multiply the other side by 10 as well!
This equals x=70
To show work on both sides, show the multiplication of both sides by 10
 
        
             
        
        
        
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