3. (x + 1)/4 = 3 / 6
 x + 1 = 3/6 x 4 = 2
 x = 1
 Scale factor = 6 / 4 = 1.5
 Ratio of perimeters = 2 : 3
4. x / 21 = 20 / 15
 x = 20 / 15 x 21 = 28
 Scale factor = 20 / 15 = 4/3
 Ratio of perimeters = 3 : 4
        
             
        
        
        
The answer is A, 75 degrees 
add all like terms
2x+196
all triangles equal 180 degrees 
2x+196=180
subtract the 196 from 180 
2x= -16
divide
x= -8
plug into angle A
-8+83
A=75
        
             
        
        
        
Round of the number to the nearest whole number then multiply it by itself. 
        
             
        
        
        
Answer:
No
Step-by-step explanation:
Multiplying the 2 and the 5 by 3 will get you 6 and 14. 14 is not a factor of 5 making it incorrect.
 
        
                    
             
        
        
        
Answer:
13,200 feet
Step-by-step explanation:
There are 5280 feet in a mile, so multiply 5280 by 2.5 
5280*2.5=13,200
So, every Wednesday, she runs 13,200 feet 
Hope this helps! :)