Answer:
Grids b and c have 25% shaded
Step-by-step explanation:
a) shaded = 5/16 = 31.25%
b) shaded = 4/16 = 25%
c) shaded = 5/20 = 25%
d) shaded = 3/10 = 30%
 
        
                    
             
        
        
        
There are many ways to solve simultaneous linear equations. One of my favorite for finding integer solutions is graphing. The attached graph shows the solution to be ...
... (x, y) = (4, 7)
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You can also use Cramer's Rule, or the Vedic math variation of it, which tells you the solution to

is given by

Here, that means
... x = (9·67-5·75)/(9·8-5·3) = 228/57 = 4
... y = (75·8-67·3)/57 = 399/57 = 7
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A (graphing) calculator greatly facilitates either of these approaches.
 
        
             
        
        
        
Answer:
A = 201.06  square inches 
Step-by-step explanation:
Radius of the pizza is 8 inches.
It is required to find the area of the pizza get by Emily's family. 
Pizza is in the shape of circle. Area of a circular figure is given by :

So, the Emily's family will get 201.06 square inches of pizza.