You would do 150/15=10 since this is a percent change it to a decimal(.10) to check do 150x.10=15 and 15/.10=150
        
                    
             
        
        
        
Answer:
a:
-4 + (-7) 
b: 
-4+7
Step-by-step explanation:
here sorry it took so long
 
        
                    
             
        
        
        
Answer:
   x = 56.25
Step-by-step explanation:
The sides of the rectangle are in the ratio 3:4, so those together with the diagonal of the rectangle make a 3-4-5 right triangle. The sum of these adjacent-side ratio units is 3+4 = 7, so the perimeter in ratio units is 2×7 = 14. The actual perimeter is 42 inches, so each ratio unit must stand for ...
   (42 in)/(14 units) = 3 in/unit
The diagonal of the rectangle is the diameter of the circle. Its length is 5 units, or ...
   (5 units)×(3 in/unit) = 15 inches.
Then the radius is half the diameter, or 7.5 inches.
The area of a circle is given by ...
   A = πr² = π(7.5 in)² = 56.25π in²
The value of x is 56.25.
 
        
             
        
        
        
Answer:
47 degrees
Step-by-step explanation:
total degrees in a triangle is 180 
since this is a right triangle there is a 90 degree in there and it also gives the 43 degree
subtract 90 and 43 from 180 and you get 47