Answer:
-25/12
Step-by-step explanation:
first, you need a common denominator. in this case, it's 12.
-1/3=-4/12
-7/4=-21/12
and then you add
-4+-21=-25
so -25/12 is your answer
 
        
                    
             
        
        
        
Answer: D) Reflection across the y-axis;  counterclockwise rotation about the origin
 counterclockwise rotation about the origin
 
        
             
        
        
        
Answer:
8 in
Step-by-step explanation:
In a cube, the length, width, and height are all the same.
 
        
                    
             
        
        
        
Answer:
The value of y is 3 cm.
Step-by-step explanation:
Given,
Perimeter of triangle = 
Solution,
Lets redraw the triangle with nomenclature ABC, given in the attachment.
∴P(ΔABC) = 29 cm  (P stands for perimeter)
Length of AB = 
Length of BC = 
Length of CA = 
Now, we all know that the perimeter of a triangle is sum of all the three sides of triangle.
P(ΔABC) = Length of AB+Length of BC+Length of CA
On substituting the values, we get;

Length of AB =
Length of BC =
Length of CA =
Hence the value of y is 3 cm.