Answer:
zeros are 4 and 3
Step-by-step explanation:
2x - 6 =0
x -4 = 0
solve both of these for x
these are your zeros
 
        
             
        
        
        
9514 1404 393
Answer:
   x = 3/2
Step-by-step explanation:
Multiply by 3 and solve the resulting 2-step equation.
   5 = (1/3)(2x +12)
   15 = 2x +12 . . . . . . multiply by 3
   3 = 2x . . . . . . . . . . subtract 12
   3/2 = x . . . . . . . . . . divide by 2
 
        
             
        
        
        
Answer:
B. 0.69
Step-by-step explanation:
Law of Cosines: cos A = (b² + c² - a²) / 2bc
cosθ = (7² + 11² - 8²) / 2*7*11 = 106/154 = 0.688 ≈ 0.69
 
        
             
        
        
        
A pyramid is regular if its base is a regular polygon, that is a polygon with equal sides and angle measures. 
(and the lateral edges of the pyramid are also equal to each other)
Thus a regular rectangular pyramid is a regular pyramid with a square base, of side length say 
x.
The lateral faces are equilateral triangles of side length 
x.
The lateral surface area is 72 cm^2, thus the area of one face is 72/4=36/2=18  cm^2.
now we need to find 
x. Consider the picture attached, showing one lateral face of the pyramid.
by the Pythagorean theorem: 

thus, 

thus:

       (cm^2)
but 

 is exactly the base area, since the base is a square of sidelength = 
x cm.
So, the total surface area = base area + lateral area =  

   cm^2
Answer: 

   cm^2
 
        
        
        
Yes, most definitely
I hope that this helps!