Answer:
43.96 or c
Step-by-step explanation: formula is d times pi and that gives you c hope this helps god bless
 
        
             
        
        
        
Answer:
x1 = t, x2 = -t and x3 = 0
Step-by-step explanation:
Given the system of equation
x1 + x2 + x3 = 0 .... 1
x1 + x2 + 9x3 = 0 .... 2
Subtract both equation
x3 - 9x3 = 0
-8x3 = 0
x3 = 0
Substitute x3 = 0 into equation 1
x1 + x2 + 0 = 0
x1+x2 = 0
x1 = -x2
Let t = x1
t = -x2
x2 = -t
Hence x1 = t, x2 = -t and x3 = 0
 
        
             
        
        
        
I took a test on this yesterday and all i know is the answer is either 81 117 or 162
        
             
        
        
        
Answer: AB = 12.5, BC = 15
<u>Step-by-step explanation:</u>
Perimeter of ΔBCD = BC + CD + BD. Since it is an isoceles triangle, then BC = CD = BD. So, Perimeter of ΔBCD = 3BC
3BC = 45
<u>÷3   </u>    <u>÷3 </u>
  BC = 15
Perimeter of ΔABC = AB + BC + AC.  Since it is an isosceles triangle with BC as the base, then AB = AC. So, Perimeter of ΔABC = 2AB + BC
2AB + BC = 40
2AB + 15 = 40
<u>          -15</u>  <u> -15 </u>
2AB       = 25
<u>÷2         </u>   <u>÷2  </u>
       AB  = 12.5
 
        
             
        
        
        
8 + 4 = 12
1/3 + 2/3 = 1
12 + 1 = 13 cups of nuts.